RazinAleks/SO-Python_QA-API_USAGE_class · Datasets at Hugging Face

2,322,868

2010-02-24T00:34:00.000

3

0

1

0

python,python-2.6,python-2.x

0

2,322,892

0

3

0

false

0

As the other people say, just ask for input to get it to hold. However, I would recommend running your Python scripts in a different manner in Windows. Using the IDLE IDE (should have come with your distribution), just open the script you want to run and press F5. Then, not only can you see the output for as long as you like, but you can also examine any variables that were assigned interactively. This is very handy especially when you are just starting to program in Python. You can also run scripts from the command line, but I would recommend use IDLE if you're just starting out.

3

0

I'm new to programming, especially Python. I'm trying to make an application that converts Fahrenheit to Celsius, but I don't know how to make the program stay open. Whenever it reaches the end of the code, it automatically closes before the user can see his or her results. I'm using Python 2.6.

How do I prevent my Python application from automatically closing once reaching the end of code?

0

0.197375

1

0

25,629

2,322,868

2010-02-24T00:34:00.000

0

1

0

python,python-2.6,python-2.x

0

2,322,884

0

3

0

false

0

ask user to enter one more variable and print "Press enter to exit..."

3

0

I'm new to programming, especially Python. I'm trying to make an application that converts Fahrenheit to Celsius, but I don't know how to make the program stay open. Whenever it reaches the end of the code, it automatically closes before the user can see his or her results. I'm using Python 2.6.

How do I prevent my Python application from automatically closing once reaching the end of code?

0

1

0

25,629

2,322,868

2010-02-24T00:34:00.000

10

0

1

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python,python-2.6,python-2.x

0

2,322,878

0

3

0

false

0

Well, I guess you mean the terminal that Windows opens for you when you run a python file is closed too fast. You can add raw_input('Press Enter to exit') right before your program would exit. It tells Python to wait for input before exiting.

3

0

I'm new to programming, especially Python. I'm trying to make an application that converts Fahrenheit to Celsius, but I don't know how to make the program stay open. Whenever it reaches the end of the code, it automatically closes before the user can see his or her results. I'm using Python 2.6.

How do I prevent my Python application from automatically closing once reaching the end of code?

0

1

0

25,629

2,323,371

2010-02-24T02:59:00.000

1

0

1

python,django,actionscript-3

1

2,323,428

0

1

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true

1

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I've used firebug to debug the flex side of things. But I've been using json or XML for communication between the two. Since flash uses the browser to do the network stuff, the request should be visible in the net tab of firebug. To debug the django side of things, you have a few options. If you're using the django dev server, you can add print statements to find out what's going on. You can write a unit test to see if the django side of things is doing what you expect it to, given known data. You can use the pyDev debugger to run the django dev server and step through your code. I use a combination of these to debug my code.

1

0

I love django, and I like flex. Django for it's cool debugging system (those yellow pages helps a lot to find bugs in my code), and flex for it possibilities. Recently I come across a problem. If I create a form in flex and then communicate with the django server, I can't see any debugging info (when the exception happens in django). Not sure, if there is a way to get the debugging info, because it is not accessible in command line (no error output), or in firebug.... Also I tried to create a quick html form, and post same data as I send from flex form, but it's a bit of pain to be honest. Will be happy to listen how do you solve the problem

django+flex: Debugging strategies

1

1.2

1

0

111

2,328,230

2010-02-24T17:53:00.000

0

1

0

java,python

0

2,328,658

0

12

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false

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Charlie, being a new hire and all, you shouldn't really decide on which technology to code the project. This is a management decision. In fact, even though team skill can be used to determine the technology of choice for one or other project, there are many other, more important, things to take into account. Which technology serves your purposes well? Assuming it can really be done in python and java: Is time-to-market really important? If you need to expand your team (i.e., extend the project), will you be able to hire more Python programmers? Are they more or less expensive than Java programmers? Are there other projects in Python at your enterprise (or your clients enterprise)? A homogeneous environment is easier to administrate. Learn the differences between Java and Python and see which one applies better to the problem. For example, Python probably performs worse than Java... But Python programs can be programmed and tested way more quickly. And, of course, yes you can take into account that there's a learning curve. As another answer put it, Python is very simple, and so is Java and almost every common language out there. What kills you is learning API's, SDK's, debugging tools, environment differences, etc. Another thing, that I draw from experience: never believe that a project is done when its done. Everything changes, so when you deliver the product, either your manager or your client (whoever will use it) will ask you to change something, and once you're done with that change, there will be more. Software are living things... they only stop changing when they are dead.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

1

0

670

2,328,230

2010-02-24T17:53:00.000

0

1

0

java,python

0

3,258,221

0

12

0

false

0

My personal preference is to learn new languages on personal projects, and use tools I already understand on professional projects. So if it was me, I'd do the project in Java, and do a few little Python projects at home. But of course, you learn a lot more a lot faster when you are using a new language "for real" forty hours a week, so if you have adequate support from management and co-workers, then take advantage of the opportunity.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

1

0

670

2,328,230

2010-02-24T17:53:00.000

1

0

1

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java,python

0

2,328,518

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12

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false

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Generally, if I'm not familiar with a language, I allow at least a month to get somewhat comfortable with it. Two or three months if it's outside my "comfort zone" of C-like languages. Having said that, I think Java and Python are similar enough that you might trim that a bit. Also, based on your own history, how good are your estimates when you're familiar with a language? If you think it will take two weeks to do it in Java, how well can you rely on that estimate? Personally, I'm sometimes way under, even when I think I'm being pessimistic, but maybe you're better at estimating than me. A part of me is tempted to say "Go for Python". That's at least partly because I'm a Python fan. However, as a new hire, you probably ought to make a good impression, and I think you'll do that better by delivering on time (or early) than by learning Python. However, if there are parts that can be cleanly separated out and done in Python, maybe you could do some parts in Java and other parts in Python.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.016665

1

0

670

2,328,230

2010-02-24T17:53:00.000

1

0

1

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java,python

0

2,328,430

0

12

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false

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I'd say if you want to avoid possible headaches, do it in Java and learn Python at home, by trying to re-create a similar application to the one you do at work, if you want something which feels real. It's likely that if you arent familiar with Python you arent going to take advantage of its capabilities anyway. Once I took a look at the first Python application I made, and it looked like I wrote an Object Pascal application in Python syntax

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.016665

1

0

670

2,328,230

2010-02-24T17:53:00.000

5

0

1

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java,python

0

2,328,250

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12

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false

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My boss's rule of thumb is any time there's a learning curve, it can triple the time to write the application. So, if Java would take you two weeks, then Python may take about 6.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.083141

1

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670

2,328,230

2010-02-24T17:53:00.000

7

0

1

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java,python

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2,328,364

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12

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false

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You have roughly 5 weeks to complete the project. If you're confident the Java version would take 2 weeks, that leaves 3 weeks to flail around with the Python version until you have to give up. I say go for it. Python is relatively easy to pick up. I think three weeks of work is enough to time to know whether you can finish by the deadline. IMHO, this is a great excuse for you to learn a new language. Keep updating your manager regularly with your progress. I think the right decision will become apparent as time goes on.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

1

0

670

2,328,230

2010-02-24T17:53:00.000

4

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java,python

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2,328,292

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12

0

false

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It always take longer than you think. Try writing a small program doing just a bit of what you need. If you are to write a program with a GUI then make small program showing a frame with Hello World and an Ok-button and see how hard that is.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.066568

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670

2,328,230

2010-02-24T17:53:00.000

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java,python

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2,328,316

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false

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Are you just programming or are you designing/architecting? If you are coding according to a design that an experienced Python resource has layed-out then I'd give myself 3-4 times as long since you've described this as a small, fairly simple project. If you are designing/architecting this yourself then you're taking on a big risk by trying to learn a new language at the same time. There's too much chance that you could design something at the onset that is core to your design, only to figure-out later that it doesn't work and you need to rewrite alot of stuff because of it. That being said I would present the risks and such to your manager (showing your obvious enthusiasm for learning Python) and let him make the call.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

1

0

670

2,328,230

2010-02-24T17:53:00.000

2

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java,python

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2,328,426

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false

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If you Google for "Pythonic", you'll find a lot of discussion about how to do things in ways that fit well in Python, will be easy to understand by other Python users, and so on. It always takes a while to progress from code that simply works in a language to using that language well -- and in the case of Python, that learning curve is a bit longer than normal. In the end, I'd say the answer depends on your age and personality (and your perception of the "personality" of your employer). Relatively speaking, Java is the conservative approach -- it reduces risks and probably gives the best chance of finishing the job on time and within budget. Using a language you don't know increases the risk of not delivering what's needed. Chances are that you'll end up writing it (at least) twice, once in a form that's pretty similar to what you would have done in Java, and then again in a form that's more Pythonic. That may well mean some late nights, especially if you get down to a week to go (or something on that order) and realize you need (or badly want) to rewrite almost everything you've done so far. It mostly comes down to a question of whether you're comfortable with assuming that risk.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.033321

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670

2,328,230

2010-02-24T17:53:00.000

3

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java,python

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2,328,275

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12

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false

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Python is like baby java, you'll pick it up in a breeze.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.049958

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2,328,230

2010-02-24T17:53:00.000

2

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java,python

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Well I would say how fast you pick up Python also depends on what other languages you know(or comfortable) apart from Java. If the only language you know is Java then I don't think the switch from Java to Python would be intuitive or smooth. To start with Java is statically typed and Python is dynamically typed, and it takes some time to get used to OO programming with Python even if you are skilled in using OO techniques using Java. So I would say honor the timeline and finish the project in time (or earlier :) using Java since this is what your work demands. Keep learning Python and automate some of the routine activities you do using Python so that you get a reasonable level of confidence to work on new project using Python.

11

13

0

I'm a relatively new hire, and I'm starting on a small, fairly simple project. The language that this project will be implemented in is still to be determined. The question basically boils down to - Java or Python? Here's the dilemma: My manager would prefer it to be done in Python. I don't object to that, but I have no experience in Python. I'd really love to learn Python and think I could manage it fairly quickly (especially as it's a small project). BUT the project is due at the end of March and must be ready by then. So they'd rather have it in Java and on time than in Python and late, and they don't want to pressure me to do it in Python if I think I can't make it on time. Sorry about the background - but my question basically is, how long does it take, on average, to adapt to a new language? I know this is subjective and personalized, and depends on how fast the particular programmer is... but talking about an average programmer, or even a somewhat fast one that picks up things quickly, what percentage of an increase does programming in a non-native language (but with similar concepts) cause? As in, if this project would take me about 2 weeks in Java or a .NET language, how much longer can it take me in Python? Can I assume that having double the amount of time (i.e. a new, unfamiliar language causes a 50% increase in programming time) is adequate? And included in this question - from what I've heard, it seems to be pretty easy/intuitive to switch over from Java to Python. Is this true...? Thanks everyone for all the answers! I didn't realize there are so many sides to this question... I will try to choose an answer soon - each response made me look at it a different way and it's hard to choose one answer.

How much leeway do I have to leave myself to learn a new language?

0

0.033321

1

0

670

2,330,393

2010-02-24T23:11:00.000

3

0

1

0

python,macos,title,menubar

0

2,330,448

0

2

0

false

0

Since your program is interpreted by Python, then what actually is run is Python itself - the interpreter program. You would have to have your Python script merged with Python into a single executable and that would be able to have a separate name. For windows there is py2exe, that does that, but I have no idea if there is a similar tool for Mac OS (and if there is any need for that, there is some BSD under the hood right?).

1

9

0

I have been building a large python program for a while, and would like to know how I would go about setting the title of the program? On a mac the title of program, which has focus, is shown in the top left corner of the screen, next the apple menu. Currently this only shows the word "Python", but I would of course like to my program's title there instead.

How to set the program title in python

0

0.291313

1

0

12,479

2,330,857

2010-02-25T01:00:00.000

0

1

0

python

0

2,330,884

0

3

1

false

0

For a simple-to-code method, I suggest using ast.parse() or eval() to create a dictionary from your string, and then accessing the fields as usual. The difference between the two functions above is that ast.parse can only evaluate base types, and is therefore more secure if someone can give you a string that could contain "bad" code.

1

0

i have a string ''' {"session_key":"3.KbRiifBOxY_0ouPag6__.3600.1267063200-16423986","uid":164 23386,"expires":12673200,"secret":"sm7WM_rRtjzXeOT_jDoQ__","sig":"6a6aeb66 64a1679bbeed4282154b35"} ''' how to get the value . thanks

which is the best way to get the value of 'session_key','uid','expires'

0

1

0

1

115

2,345,607

2010-02-26T23:57:00.000

0

1

0

python,windows,python-idle

1

29,289,580

0

7

0

false

0

Just add IDLE's path to your PATH environment variable. For example I created an environment variable called IDLE_PATH and set the value to C:\Python27\Lib\idlelib Then in my PATH variable I added ;%IDLE_PATH%; and open a new cmd prompt or in console2 just open a new tab and run idle <file_name> to open the file, you will be able to do this from any directory. In IPython console add an ! before the command, for example !idle test.py. Congrates, Now you're a python pimp!

2

10

0

I've tried many variations of this command: idle.py -e filepath, but it simply starts IDLE like normal, not opening any extra windows for editing, and not throwing any errors. So how can I do the equivalent of opening IDLE, file>open>filepath via the command line (or perhaps even a Python module)?

starting Python IDLE from command line to edit scripts

1

0

1

0

58,831

2,345,607

2010-02-26T23:57:00.000

2

0

1

0

python,windows,python-idle

1

39,559,184

0

7

0

false

0

first make sure you have location of idle in path I am using "python3.5".So mine looks like this: C:\Program Files\Python35\Lib\idlelib.Yours may differ. use this following command:idle -r file_name.py to run the file or just idle file_name.py to edit or start idle -r file_name.py ^&exit

2

10

0

I've tried many variations of this command: idle.py -e filepath, but it simply starts IDLE like normal, not opening any extra windows for editing, and not throwing any errors. So how can I do the equivalent of opening IDLE, file>open>filepath via the command line (or perhaps even a Python module)?

starting Python IDLE from command line to edit scripts

1

0.057081

1

0

58,831

2,352,342

2010-02-28T19:35:00.000

8

0

1

0

c++,python,dictionary,hashmap,tr1

0

2,352,356

0

1

0

true

0

Keys in all C++ map/set containers are const and thus immutable (after added to the container). Notice that C++ containers are not specific to string keys, you can use any objects, but the constness will prevent modifications after the key is copied to the container.

1

9

0

I have a question related to understanding of how python dictionaries work. I remember reading somewhere strings in python are immutable to allow hashing, and it is the same reason why one cannot directly use lists as keys, i.e. the lists are mutable (by supporting .append) and hence they cannot be used as dictionary keys. I wanted to know how does implementation of unordered_map in C++ handles these cases. (since strings in C++ are mutable)

The difference between python dict and tr1::unordered_map in C++

1

1.2

1

0

1,825

2,353,963

2010-03-01T05:02:00.000

1

0

1

0

python,winapi

0

2,354,011

0

6

0

false

0

Find out how to do what you want using commands (on the command line) and script these commands instead.

2

13

0

I want to make a Python script that automates the process of setting up a VPN server in Windows XP, but the only way I know how to do it is using the Windows GUI dialogs. How would I go about figuring out what those dialogs are doing to the system and designing a Python script to automate it?

Automate Windows GUI operations with Python

0

0.033321

1

0

13,254

2,353,963

2010-03-01T05:02:00.000

0

1

0

python,winapi

0

26,197,899

0

6

0

false

0

PyAutoGUI can be installed with pip from PyPI. It's cross platform and can control the mouse & keyboard. It has the features of pywinauto and a few more on top. It can't identify windows or GUI controls, but it does have basic screenshot & image recognition features to click on particular buttons. And it's well-documented and maintained. pip install pyautogui

2

13

0

I want to make a Python script that automates the process of setting up a VPN server in Windows XP, but the only way I know how to do it is using the Windows GUI dialogs. How would I go about figuring out what those dialogs are doing to the system and designing a Python script to automate it?

Automate Windows GUI operations with Python

0

1

0

13,254

2,359,994

2010-03-01T23:49:00.000

0

1

0

python,xcode

0

2,360,880

0

4

0

false

0

A lot of people like eclipse with PyDev for python, although I don't know how wel it works on OS X with apple's mishandling of java.

2

3

0

Could anyone tell me how to use pure Python without Cocoa support in Xcode? I can only find the Cocoa-Python template on the Internet. Thanks in advance.

Pure Python in Xcode?

0

1

0

4,138

2,359,994

2010-03-01T23:49:00.000

0

1

0

python,xcode

0

2,360,692

0

4

0

false

0

Just about the best IDE for editing and running Python code is actually still emacs. The python-mode for emacs does a wonderful job of maintaining whitespace and, with a bit of configuration, emacs is truly a powerful editor. Pretty radically different than your typical GUI editor, certainly, and some find it quite distasteful. I've personally used emacs, mostly, for editing Python since 1992 or so. Google will reveal all, including a native version of Emacs for Mac OS X.

2

3

0

Could anyone tell me how to use pure Python without Cocoa support in Xcode? I can only find the Cocoa-Python template on the Internet. Thanks in advance.

Pure Python in Xcode?

0

1

0

4,138

2,373,446

2010-03-03T17:22:00.000

0

1

0

python,django,unit-testing,automated-tests,windmill

0

2,468,981

0

1

0

false

1

0

Ok, so couldn't find out how to do this so I'm running the website under Apache and using the windmill standard jstests parameter to run the Javascript tests against this.

1

0

I'm using the Windmill test system and have it running using test_windmill for Django which works fine for the Python tests. I'd like this to run a suite of Javascript tests also whilst the Django test server is running. I've used the run_js_tests call from the Windmill shell which works fine but I can't find a way to have this run as part of the Python tests. Does anyone know how to do this? Thanks Rob

How do I run Javascript tests in Windmill when using test_windmill for Django?

0

1

0

354

2,374,233

2010-03-03T19:18:00.000

3

1

0

python,c,64-bit,porting,psyco

0

3,738,027

0

4

0

false

0

Psyco assumes that sizeof(int) == sizeof(void*) a bit all over the place. That's much harder than just writing down 64bit calling conventions and assembler. On the sidenote, pypy has 64bit jit support these days. Cheers, fijal

2

10

0

The Psyco docs say: Just for reference, Psyco does not work on any 64-bit systems at all. This fact is worth being noted again, now that the latest Mac OS/X 10.6 "Snow Leopart" comes with a default Python that is 64-bit on 64-bit machines. The only way to use Psyco on OS/X 10.6 is by recompiling a custom Python in 32-bit mode. In general, porting programs from 32 to 64 bits is only really an issue when the code assumes a certain size for a pointer type and other similarly small(ish) issues. Considering that Psyco isn't a whole lot of code (~32K lines of C + ~8K lines of Python), how hard could it be? Has anyone tried this and hit a wall? I haven't really had a chance to take a good look at the Psyco sources yet, so I'd really appreciate knowing if I'm wasting my time looking into this...

What are the possible pitfalls in porting Psyco to 64-bit?

0

0.148885

1

0

1,103

2,374,233

2010-03-03T19:18:00.000

3

1

0

python,c,64-bit,porting,psyco

0

2,374,371

0

4

0

true

0

Since psyco is a compiler, it would need to be aware of the underlying assembly language to generate useful code. That would mean it would need to know about the 8 new registers, new opcodes for 64 bit code, etc. Furthermore, to interop with the existing code, it would need to use the same calling conventions as 64 bit code. The AMD-64 calling convention is similar to the old fast-call conventions in that some parameters are passed in registers (in the 64 bit case rcx,rdx,r8,r9 for pointers and Xmm0-Xmm3 for floating point) and the rest are pushed onto spill space on the stack. Unlike x86, this extra space is usually allocated once for all of the possible calls. The IA64 conventions and assembly language are different yet. So in short, I think this is probably not as simple as it sounds.

2

10

0

The Psyco docs say: Just for reference, Psyco does not work on any 64-bit systems at all. This fact is worth being noted again, now that the latest Mac OS/X 10.6 "Snow Leopart" comes with a default Python that is 64-bit on 64-bit machines. The only way to use Psyco on OS/X 10.6 is by recompiling a custom Python in 32-bit mode. In general, porting programs from 32 to 64 bits is only really an issue when the code assumes a certain size for a pointer type and other similarly small(ish) issues. Considering that Psyco isn't a whole lot of code (~32K lines of C + ~8K lines of Python), how hard could it be? Has anyone tried this and hit a wall? I haven't really had a chance to take a good look at the Psyco sources yet, so I'd really appreciate knowing if I'm wasting my time looking into this...

What are the possible pitfalls in porting Psyco to 64-bit?

0

1.2

1

0

1,103

2,375,125

2010-03-03T21:30:00.000

1

0

1

0

python,linux,fonts,debian,python-imaging-library

0

2,375,489

0

2

0

false

0

you best bet is to do a find on all the fonts on the system, and then use ImagesFont.load() on the results of that list. I don't know where the fonts are on Debian, but they should be in a well known folder you can just do an os.walk and then feed the filenames in that way.

2

4

0

I'm looking for a way to list all fonts installed on a linux/Debian system, and then generate images of some strings using these fonts. I'm looking for your advice as I kind of see how to do each part, but not to do both: To list all fonts on a UNIX system, xlsfonts can do the trick: import os list_of_fonts=os.popen("xslfonts").readlines() To render a string into an image using a font, I could use PIL (Python Imaging Library) and the ImageFont class. However, ImagesFont.load expects a file name, whereas xlsfonts gives a kind of normalized font name, and the correspondence between the two doesn't seems obvious (I tried to search my system for files named as the output of xlsfonts, without results). Does anyone has an idea on how I can do that? Thanks!

Generate image for each font on a linux system using Python

0

0.099668

1

0

894

2,375,125

2010-03-03T21:30:00.000

1

0

1

0

python,linux,fonts,debian,python-imaging-library

0

2,375,457

0

2

0

true

0

You can do this using pango, through the pygtk package. Pango can list fonts and render them.

2

4

0

I'm looking for a way to list all fonts installed on a linux/Debian system, and then generate images of some strings using these fonts. I'm looking for your advice as I kind of see how to do each part, but not to do both: To list all fonts on a UNIX system, xlsfonts can do the trick: import os list_of_fonts=os.popen("xslfonts").readlines() To render a string into an image using a font, I could use PIL (Python Imaging Library) and the ImageFont class. However, ImagesFont.load expects a file name, whereas xlsfonts gives a kind of normalized font name, and the correspondence between the two doesn't seems obvious (I tried to search my system for files named as the output of xlsfonts, without results). Does anyone has an idea on how I can do that? Thanks!

Generate image for each font on a linux system using Python

0

1.2

1

0

894

2,376,355

2010-03-04T01:40:00.000

0

1

0

python,math,finance

0

2,427,737

0

2

0

true

0

Thanks for the assistance even though my requirements were a bit vague. After consulting someone who is extremely versed in financial mathematics, I determined that a simple formula was not an appropriate solution. What I ended up doing is "exploding" the months into the component days using xrange() and iterating over each day. When evaluating each day, I determined whether a new contract was signed on that day, and if so, which dates in future the contract would need to be renewed. I pushed those renewal dates into a list and then summed the values.

1

0

(I asked this question earlier today, but I did a poor job of explaining myself. Let me try again) I have a client who is an industrial maintenance company. They sell service agreements that are prepaid 20 hour blocks of a technician's time. Some of their larger customers might burn through that agreement in two weeks while customers with fewer problems might go eight months on that same contract. I would like to use Python to help model projected sales revenue and determine how many billable hours per month that they'll be on the hook for. If each customer only ever bought a single service contract (never renewed) it would be easy to figure sales as monthly_revenue = contract_value * qty_contracts_sold. Billable hours would also be easy: billable_hrs = hrs_per_contract * qty_contracts_sold. However, how do I account for renewals? Assuming that 90% (or some other arbitrary amount) of customers renew, then their monthly revenue ought to grow geometrically. Another important variable is how long the average customer burns through a contract. How do I determine what the revenue and billable hours will be 3, 6, or 12 months from now, based on various renewal and burn rates? I assume that I'd use some type of recursive function but math was never one of my strong points. Any suggestions please? Edit: I'm thinking that the best way to approach this is to think of it as a "time value of money" problem. I've retitled the question as such. The problem is probably a lot more common if you think of "monthly sales" as something similar to annuity payments.

Python and a "time value of money" problem

0

1.2

1

0

987

2,386,421

2010-03-05T11:48:00.000

0

1

0

python,pep

0

2,386,453

0

7

0

false

0

Either add it to the tracker, or join the developer mailing list and suggest it there. Better to do that if you feel you can contribute at least to developing the specification, if not the feature itself.

3

9

0

Suppose I think I have a great idea for some feature that should be in python's standard library. Not something of the magnitude of a new keyword etc, just a suggestion for another decorator that would help a lot, IMO. How can I suggest such a feature to the consideration of the "python committee :)"?

how can I make a suggestion for a new feature in python

0

1

0

1,127

2,386,421

2010-03-05T11:48:00.000

0

1

0

python,pep

0

2,386,461

0

7

0

false

0

An alternative to the issue tracker suggested by mpalcona: you can submit it for discussion on the python-dev mailing list. And always, a reference implementation (something that works, even if not in all cases and not efficiently) is always welcomed.

3

9

0

Suppose I think I have a great idea for some feature that should be in python's standard library. Not something of the magnitude of a new keyword etc, just a suggestion for another decorator that would help a lot, IMO. How can I suggest such a feature to the consideration of the "python committee :)"?

how can I make a suggestion for a new feature in python

0

1

0

1,127

2,386,421

2010-03-05T11:48:00.000

0

1

0

python,pep

0

2,387,822

0

7

0

false

0

Don't waste time "suggesting" things. Invest time doing things. Simply do this. Build it. Use it. Post it to SourceForge. Put a link to the SourceForge project on PyPi. Done. If it's actually a "great" idea, then everyone will use it and someone will recommend adding it to the standard library. If it's not a "great" idea, but merely good, then everyone will use it. If it's just an idea, you'll notice the number of downloads will remain small.

3

9

0

Suppose I think I have a great idea for some feature that should be in python's standard library. Not something of the magnitude of a new keyword etc, just a suggestion for another decorator that would help a lot, IMO. How can I suggest such a feature to the consideration of the "python committee :)"?

how can I make a suggestion for a new feature in python

0

1

0

1,127

2,392,949

2010-03-06T15:20:00.000

0

1

0

.net,python,active-directory,directoryservices

0

14,938,596

0

2

0

false

0

The problem with some of these properties is that you can see them on the UI via Active Directory Users and Computers, but you cannot set them (or see them) via ADSI Editor. Usually, for properties that aren't directly available from a DirectoryEntry object, you can use its Properties collection as described by Tim Robbinson (e.g. directoryEntry.Properties["PropertyName"].Value). For some properties, however, you cannot use this approach and have to use directoryEntry.InvokeSet("PropertyName", new object[]{ "SomeValue" });, e.g. for TerminalServicesHomeDirectory, TerminalServicesHomeDrive and TerminalServicesProfilePath. As said above, you won't see these three properties using ADSI Editor, you can only see the property values via the "normal" UI on the corresponding tab. How you can apply all this to Python I don't know, but it seems you've got instances of the DirectoryEntry class, so you should be fine.

1

0

I need to set properties related to Remote Desktop Services on Active Directory users in .NET (i.e., via System.DirectoryServices), but I can't see that these properties are exposed by the API? I know there is a COM interface for this purpose, IADsTSUserEx. Please show me how I can get at these properties in .NET :) Bear in mind that the programming language is Python.

How do I change Remote Desktop Services properties of AD users in .NET?

0

1

0

2,366

2,401,789

2010-03-08T14:03:00.000

0

1

0

python,unit-testing,aop

0

2,402,152

0

3

1

false

1

0

Well... let's see. In my opinion you are testing three different things here (sorry for the "Java AOP jargon"): the features implemented by the interceptors (i.e. the methods that implement the functions activated at the cutpoints) the coverage of the filters (i.e. whether the intended cutpoints are activated correctly or not) the interaction between the cutpoints and the interceptors (with the side effects) You are unit testing (strictly speaking) if you can handle these three layers separatedly. You can actually unit test the first; you can use a coverage tool and some skeleton crew application with mock objects to test the second; but the third is not exactly unit testing, so you may have to setup a test environment, design an end-to-end test and write some scripts to input data in your application and gather the results (if it was a web app you could use Selenium, for example).

2

4

0

I'd like to know what would you propose as the best way to unit test aspect-oriented application features (well, perhaps that's not the best name, but it's the best I was able to come up with :-) ) such as logging or security? These things are sort of omni-present in the application, so how to test them properly? E.g. say that I'm writing a Cherrypy web server in Python. I can use a decorator to check whether the logged-in user has the permission to access a given page. But then I'd need to write a test for every page to see whether it works oK (or more like to see that I had not forgotten to check security perms for that page). This could maybe (emphasis on maybe) be bearable if logging and/or security were implemented during the web server "normal business implementation". However, security and logging usually tend to be added to the app as an afterthough (or maybe that's just my experience, I'm usually given a server and then asked to implement security model :-) ). Any thoughts on this are very welcome. I have currently 'solved' this issue by, well - not testing this at all. Thanks.

Unit testing aspect-oriented features

0

1

0

258

2,401,789

2010-03-08T14:03:00.000

1

0

python,unit-testing,aop

0

2,796,926

0

3

1

false

1

0

IMHO, the way of testing users permissions to the pages depends on the design of your app and design of the framework you're using. Generally, it's probably enough to cover your permission checker decorator with unit tests to make sure it always works as expected and then write a test that cycles through your 'views' (or whatever term cherrypy uses, haven't used it for a very long time) and just check if these functions are decorated with appropriate decorator. As for logging it's not quite clear what you want test specifically. Anyway, why isn't it possible to stub the logging functionality and check what's going on there?

2

4

0

I'd like to know what would you propose as the best way to unit test aspect-oriented application features (well, perhaps that's not the best name, but it's the best I was able to come up with :-) ) such as logging or security? These things are sort of omni-present in the application, so how to test them properly? E.g. say that I'm writing a Cherrypy web server in Python. I can use a decorator to check whether the logged-in user has the permission to access a given page. But then I'd need to write a test for every page to see whether it works oK (or more like to see that I had not forgotten to check security perms for that page). This could maybe (emphasis on maybe) be bearable if logging and/or security were implemented during the web server "normal business implementation". However, security and logging usually tend to be added to the app as an afterthough (or maybe that's just my experience, I'm usually given a server and then asked to implement security model :-) ). Any thoughts on this are very welcome. I have currently 'solved' this issue by, well - not testing this at all. Thanks.

Unit testing aspect-oriented features

0

0.066568

1

0

258

2,409,168

2010-03-09T13:04:00.000

2

0

1

0

python

0

2,409,213

0

2

0

false

0

You could write a installer (using NSIS or something) that does two things : install LateX (or make sure there is an installation of latex available), potentially by calling another installer then install your python script (which can assume latex is now available)

1

0

I wanted to know how can I make standalone application in python. Basically what I am doing right now is I have a template.tex file and my script generate the pdf by giving some input values. So I have to make exe file for windows and same for linux. I can use cx_freeze for creating exe file. But my problem is most of people do not contain latex on their computer. SO how can I make latex get install when I first run my exe. Basically how to make make file. Thanks

standalone application in python

1

0.197375

1

0

467

2,414,616

2010-03-10T04:56:00.000

1

0

1

0

c#,c++,python

0

2,414,677

0

5

0

false

0

The first solution would be to fix your EXE, so it does not crash. If you can not fix it now, you probably need to add exception handling, so you can catch the exception, and not close the EXE. Second solution is to write simple guard programm that will start your simple .exe and will monitor specific process handle. It will restart your program when it closes.

1

0

I have a simple .exe that needs to be running continuously. Unfortunately, sometimes it crashes unexpectedly, and there's nothing that can be done for this. I'm thinking of like a C# program that scans the running application tree on a timer and if the process stops running it re-launches it... ? Not sure how to do that though.... Any other ideas?

How to make script/program to make it so an application is always running?

0

0.039979

1

0

221

2,417,705

2010-03-10T14:39:00.000

1

0

python,gtk,pygtk,mplayer

0

2,944,206

0

2

0

false

0

1

You need to tell mplayer to zoom video according to window size. This can be done either in command line (-zoom) or in the configuration file (zoom = 1).

1

0

I've wrote a piece of code in python and pygtk for an embeded mplayer in a gui. I assume I use GtkSocket and the slave mode of mplayer with the -wid option. But I've got an issue, when the size of my GTK window is smaller than my stream, the stream appears to be cropped. And when the size of my window is bigger than my stream, the stream appear centred inside the widget which embed MPlayer. (a gtk.Frame but I've also try with a gtk.DrawingArea) I would like to know how I can get my stream resize dynamically depending on the window's size. I don't want to use Glade or any GUI builder. Thanks in advance for any help, and please excuse my poor english.

Dynamic resize with MPlayer and PyGTK

0

0.099668

1

0

1,512

2,419,770

2010-03-10T19:11:00.000

76

0

1

0

python,generator

0

2,421,288

0

6

0

false

0

In Python <= 2.5, use gen.next(). This will work for all Python 2.x versions, but not Python 3.x In Python >= 2.6, use next(gen). This is a built in function, and is clearer. It will also work in Python 3. Both of these end up calling a specially named function, next(), which can be overridden by subclassing. In Python 3, however, this function has been renamed to __next__(), to be consistent with other special functions.

4

143

0

Very basic question - how to get one value from a generator in Python? So far I found I can get one by writing gen.next(). I just want to make sure this is the right way?

How to get one value at a time from a generator function in Python?

0

1

0

99,132

2,419,770

2010-03-10T19:11:00.000

5

0

1

0

python,generator

0

60,391,726

0

6

0

false

0

To get the value associated with a generator object in python 3 and above use next(<your generator object>). subsequent calls to next() produces successive object values in the queue.

4

143

0

Very basic question - how to get one value from a generator in Python? So far I found I can get one by writing gen.next(). I just want to make sure this is the right way?

How to get one value at a time from a generator function in Python?

0

0.16514

1

0

99,132

2,419,770

2010-03-10T19:11:00.000

189

0

1

0

python,generator

0

2,419,782

0

6

0

true

0

Yes, or next(gen) in 2.6+.

4

143

0

Very basic question - how to get one value from a generator in Python? So far I found I can get one by writing gen.next(). I just want to make sure this is the right way?

How to get one value at a time from a generator function in Python?

0

1.2

1

0

99,132

2,419,770

2010-03-10T19:11:00.000

1

0

1

0

python,generator

0

37,890,506

0

6

0

false

0

In python 3 you don't have gen.next(), but you still can use next(gen). A bit bizarre if you ask me but that's how it is.

4

143

0

Very basic question - how to get one value from a generator in Python? So far I found I can get one by writing gen.next(). I just want to make sure this is the right way?

How to get one value at a time from a generator function in Python?

0

0.033321

1

0

99,132

2,420,219

2010-03-10T20:11:00.000

5

0

1

0

python,memory,data-structures,matrix,swap

0

2,420,257

0

4

0

false

0

You need a database, if the data will exceed memory. The indexing of dictionaries isn't designed for good performance when a dictionary is bigger than memory.

2

4

0

I have a python program that is going to eat a lot of memory, primarily in a dict. This dict will be responsible for assigning a unique integer value to a very large set of keys. As I am working with large matrices, I need a key-to-index correspondence that can also be recovered from (i.e., once matrix computations are complete, I need to map the values back to the original keys). I believe this amount will eventually surpass available memory. I am wondering how this will be handled with regards to swap space. Perhaps there is a better data structure for this purpose.

How does OS handle a python dict that's larger than memory?

0

0.244919

1

0

1,227

2,420,219

2010-03-10T20:11:00.000

1

0

1

0

python,memory,data-structures,matrix,swap

0

2,420,260

0

4

0

true

0

It will just end up in swap trashing, because a hash table has very much randomized memory access patterns. If you know that the map exceeds the size of the physical memory, you could consider using a data structure on the disk in the first place. This especially if you don't need the data structure during the computation. When the hash table triggers swapping, it creates problems also outside the hash table itself.

2

4

0

I have a python program that is going to eat a lot of memory, primarily in a dict. This dict will be responsible for assigning a unique integer value to a very large set of keys. As I am working with large matrices, I need a key-to-index correspondence that can also be recovered from (i.e., once matrix computations are complete, I need to map the values back to the original keys). I believe this amount will eventually surpass available memory. I am wondering how this will be handled with regards to swap space. Perhaps there is a better data structure for this purpose.

How does OS handle a python dict that's larger than memory?

0

1.2

1

0

1,227

2,435,281

2010-03-12T19:32:00.000

0

python,database,postgresql

0

2,435,639

0

1

0

true

0

To make sure we're on the same page, is the following correct? You're inserting the photo information into the Photo table immediately after the user uploads the photo but before he/she submits the form; When the user submits the form, you're inserting a row into the User table; One of the items in that row is information about the previously created photo entry. If so, you should be able to store the "path to photo" information in a Python variable until the user submits the form, and then use the value from that variable in your User-table insert.

1

0

Let's say I have an user registration form. In this form, I have the option for the user to upload a photo. I have an User table and Photo table. My User table has a "PathToPhoto" column. My question is how do I fill in the "PathToPhoto" column if the photo is uploaded and inserted into Photo table before the user is created? Another way to phrase my question is how to get the newly uploaded photo to be associated to the user that may or may not be created next. I'm using python and postgresql.

Database: storing data from user registration form

0

1.2

1

0

397

2,439,039

2010-03-13T16:22:00.000

1

0

1

python,wxwidgets

0

2,439,208

0

2

0

false

0

1

You can embed IE, but I think that's about it. wxWebKit is working on a wx add-on to use WebKit as an embedded browser in wx, but I think it's still a work in progress.

1

0

I need to show a webpage (a complex page with script and stuff, no static html) in a frame or something. It's for a desktop application, I'm using python 2.6 + wxPython 2.8.10.1. I need to catch some events too (mostly about changing page). I've found some samples using the webview module in a gtk application, but I couldn't have it works on wx.

how to embed a webpage using wx?

0

0.099668

1

0

788

2,440,579

2010-03-13T23:53:00.000

3

0

1

0

1

python,macos,gcc,distutils,setup.py

0

2,440,981

0

2

0

true

0

I'm guessing you've installed 2.6 on 10.5 using the python.org OS X installer. In that case, the flags are accurate and you should not try to change them. The python.org installers are built using the so-called 10.4u SDK and with a deployment target of 10.3, allowing one installer image to work on Mac OS X systems from 10.3.9 up through 10.6 (and possibly beyond). The most recent releases of Python 2.6 have been fixed to ensure that extension module building on OS X forces the C compiler options to match those of the underlying Python so you'll need to make sure you install the 10.4u SDK (or whatever) if necessary from the Xcode package (on the OS X release CD/DVD or downloaded from the Apple Developer Connection website). It will also make sure you are using gcc-4.0, which is also the default on 10.5.

1

2

0

I'm trying to install matplotlib on my mac setup. I find that setup.py has inaccurate flags, in particular the isysroot points to an earlier SDK. Where does setup.py get its info and how can i fix it? I'm on MacOS 10.5.8, XCode 3.1.2 and Python 2.6 (default config was 2.5)

Compiler options wrong with python setup.py

0

1.2

1

0

1,851

2,445,193

2010-03-15T05:04:00.000

7

0

1

0

python

0

2,445,239

0

5

0

false

0

Python is dynamically typed: all variables can refer to an object of any type. id and name can be anything, but the actual objects are of types like int and str. 0 is a literal that is parsed to make an int object, and 'John' a literal that makes a str object. Many object types do not have literals and are returned by a callable (like frozenset—there's no way to make a literal frozenset, you must call frozenset.) Consequently, there is no such thing as declaration of variables, since you aren't defining anything about the variable. id = 0 and name = 'John' are just assignment. increase returns an int because that's what you return in it; nothing in Python forces it not to be any other object. first and second are only ints if you make them so. Objects, to a certain extent, share a common interface. You can use the same operators and functions on them all, and if they support that particular operation, it works. It is a common, recommended technique to use different types that behave similarly interchangably; this is called duck typing. For example, if something takes a file object you can instead pass a cStringIO.StringIO object, which supports the same method as a file (like read and write) but is a completely different type. This is sort of like Java interfaces, but does not require any formal usage, you just define the appropriate methods.

3

6

0

Sorry if this is quite noobish to you, but I'm just starting out to learn Python after learning C++ & Java, and I am wondering how in the world I could just declare variables like id = 0 and name = 'John' without any int's or string's in front! I figured out that perhaps it's because there are no ''s in a number, but how would Python figure that out in something like def increase(first, second) instead of something like int increase(int first, int second) in C++?!

How does Python differentiate between the different data types?

1

0

1,782

2,445,193

2010-03-15T05:04:00.000

13

0

1

0

python

0

2,445,233

0

5

0

true

0

The literal objects you mention carry (pointers to;-) their own types with them of course, so when a name's bound to that object the problem of type doesn't arise -- the object always has a type, the name doesn't -- just delegates that to the object it's bound to. There's no "figuring out" in def increase(first, second): -- name increase gets bound to a function object, names first and second are recorded as parameters-names and will get bound (quite possibly to objects of different types at various points) as increase gets called. So say the body is return first + second -- a call to increase('foo', 'bar') will then happily return 'foobar' (delegating the addition to the objects, which in this case are strings), and maybe later a call to increase(23, 45) will just as happily return 68 -- again by delegating the addition to the objects bound to those names at the point of call, which in this case are ints. And if you call with incompatible types you'll get an exception as the delegated addition operation can't make sense of the situation -- no big deal!

3

6

0

Sorry if this is quite noobish to you, but I'm just starting out to learn Python after learning C++ & Java, and I am wondering how in the world I could just declare variables like id = 0 and name = 'John' without any int's or string's in front! I figured out that perhaps it's because there are no ''s in a number, but how would Python figure that out in something like def increase(first, second) instead of something like int increase(int first, int second) in C++?!

How does Python differentiate between the different data types?

1

1.2

1

0

1,782

2,445,193

2010-03-15T05:04:00.000

4

0

1

0

python

0

2,445,220

0

5

0

false

0

When it comes to assigning literal values to variables, the type of the literal value can be inferred at the time of lexical analysis. For example, anything matching the regular expression (-)?[1-9][0-9]* can be inferred to be an integer literal. If you want to convert it to a float, there needs to be an explicit cast. Similarly, a string literal is any sequence of characters enclosed in single or double quotes. In a method call, the parameters are not type-checked. You only need to pass in the correct number of them to be able to call the method. So long as the body of the method does not cause any errors with respect to the arguments, you can call the same method with lots of different types of arguments.

3

6

0

Sorry if this is quite noobish to you, but I'm just starting out to learn Python after learning C++ & Java, and I am wondering how in the world I could just declare variables like id = 0 and name = 'John' without any int's or string's in front! I figured out that perhaps it's because there are no ''s in a number, but how would Python figure that out in something like def increase(first, second) instead of something like int increase(int first, int second) in C++?!

How does Python differentiate between the different data types?

1

0.158649

1

0

1,782

2,447,118

2010-03-15T12:45:00.000

1

0

1

0

java,python

0

2,495,504

0

13

0

false

1

0

Try to find algorithms that you understand well and see how they are implemented in python standard libraries. Persist. :)

4

34

0

I've been writing Java for the last couple of years , and now I've started to write in python (in addition). The problem is that when I look at my Python code it looks like someone tried to hammer Java code into a python format , and it comes out crappy because - well , python ain't Java. Any tips on how to escape this pattern of "Writing Java in Python"? Thanks!

Programming in Python vs. programming in Java

1

0.015383

1

0

7,368

2,447,118

2010-03-15T12:45:00.000

0

1

0

java,python

0

2,447,141

0

13

0

false

1

0

Learn a few other languages. It will help you make the difference between algorithms (the structure of processing, unchanged between languages) and the local syntaxic features of the language. Then you can "write Foo in Bar" for any combination of languages "Foo" and "Bar".

4

34

0

I've been writing Java for the last couple of years , and now I've started to write in python (in addition). The problem is that when I look at my Python code it looks like someone tried to hammer Java code into a python format , and it comes out crappy because - well , python ain't Java. Any tips on how to escape this pattern of "Writing Java in Python"? Thanks!

Programming in Python vs. programming in Java

1

0

1

0

7,368

2,447,118

2010-03-15T12:45:00.000

0

1

0

java,python

0

2,495,445

0

13

0

false

1

0

Eat Python, Sleep Python and Drink Python. That is the only way........

4

34

0

I've been writing Java for the last couple of years , and now I've started to write in python (in addition). The problem is that when I look at my Python code it looks like someone tried to hammer Java code into a python format , and it comes out crappy because - well , python ain't Java. Any tips on how to escape this pattern of "Writing Java in Python"? Thanks!

Programming in Python vs. programming in Java

1

0

1

0

7,368

2,447,118

2010-03-15T12:45:00.000

3

0

1

0

java,python

0

2,448,287

0

13

0

false

1

0

Definitely not a panacea but I think you should try some code golf in Python. Obviously nobody should write "golfed" code IRL, but finding the most terse way to express something really forces you to exploit the built in functionality of the language.

4

34

0

I've been writing Java for the last couple of years , and now I've started to write in python (in addition). The problem is that when I look at my Python code it looks like someone tried to hammer Java code into a python format , and it comes out crappy because - well , python ain't Java. Any tips on how to escape this pattern of "Writing Java in Python"? Thanks!

Programming in Python vs. programming in Java

1

0.046121

1

0

7,368

2,452,488

2010-03-16T06:24:00.000

3

0

1

0

python,security,filesystems,sandbox

0

2,452,503

0

3

0

false

0

You are probably best to use a virtual machine like VirtualBox or VMware (perhaps even creating one per user/session). That will allow you some control over other resources such as memory and network as well as disk The only python that I know of that has such features built in is the one on Google App Engine. That may be a workable alternative for you too.

1

4

0

I have a web service to which users upload python scripts that are run on a server. Those scripts process files that are on the server and I want them to be able to see only a certain hierarchy of the server's filesystem (best: a temporary folder on which I copy the files I want processed and the scripts). The server will ultimately be a linux based one but if a solution is also possible on Windows it would be nice to know how. What I though of is creating a user with restricted access to folders of the FS - ultimately only the folder containing the scripts and files - and launch the python interpreter using this user. Can someone give me a better alternative? as relying only on this makes me feel insecure, I would like a real sandboxing or virtual FS feature where I could run safely untrusted code.

faking a filesystem / virtual filesystem

1

0.197375

1

0

1,877

2,456,926

2010-03-16T18:11:00.000

0

python,pylons

1

2,457,303

0

1

0

false

1

I'm assuming that "I can only get the first value" means you've got a series of checkboxes with the same value for the 'name' attribute within your form? Now, if that's the case and you're wanting a list of boolean values based on whether or not the boxes are checked or not, you'll need to do two things: First, when you define your form elements using form encode on your checkbox, set it up such that a missing value on a checkbox element returns 'False.' This way, as the browser won't send a value over unless a checkbox is "on", you validation coerces the missing value to False. class Registration(formencode.Schema): box = formencode.validators.StringBoolean(if_missing=False) Next, assuming you want a list returned, you'll not be able to name all of your elements the same. Pylons supports a nested structure, though. Look at formencode.variabledecode.NestedVariables. In short, you'll need to define a NestedVariables instance as one of your class attributes and your form 'name' attributes will need to change in order to contain explicit indexes. Edit.. here's a complete example I did real quick: import logging import pprint import formencode from pylons import request, response, session, tmpl_context as c, url from pylons.controllers.util import abort, redirect from pylons.decorators import validate from testproj.lib.base import BaseController, render log = logging.getLogger(__name__) class CheckList(formencode.Schema): box = formencode.validators.StringBoolean(if_missing=False) hidden = formencode.validators.String() class EnclosingForm(formencode.Schema): pre_validators = [formencode.NestedVariables()] boxes = formencode.ForEach(CheckList()) class MyformController(BaseController): def index(self): schema = EnclosingForm() v = schema.to_python(dict(request.params)) # Return a rendered template #return render('/myform.mako') # or, return a response response.content_type = 'text/plain' return pprint.pformat(v) And then the query string? boxes-0.box=true&boxes-0.hidden=hidden&boxes-1.box=true& boxes-1.hidden=hidden&boxes-2.hidden=hidden And lastly, the response: {'boxes': [{'box': True, 'hidden': u'hidden'}, {'box': True, 'hidden': u'hidden'}, {'box': False, 'hidden': u'hidden'}]} HTH

1

0

I have been trying to add some check boxes in a pylons mako. However I don't know how to get their values in the controller. It seems that it can only get the first value of the check boxes. I tried using form encode but i got several errors. Is there an easier way to do this? Thanks

Checkboxes with pylons

0

1

0

1,306

2,460,401

2010-03-17T07:04:00.000

2

0

1

0

1

python,matplotlib,tkinter,break,python-idle

0

31,151,803

0

4

0

false

0

I had same issue in Canopy Python Editor, and I was able to interrupt python session with CTRL+. ("dot" button). Hope that helps, or they probably do things in a similar ways

3

11

0

I have a python script that uses plt.show() as it's last instruction. When it runs, IDLE just hangs after the last instruction. I get the image but I don't get the prompt back. On other scripts I typically use ctrl-c to break the program (sometimes doesn't work immediately) but how do I get the prompt back with the plt.show()? Ctrl-c doesn't work... Are there other ways to stop the program? This is IDLE on Windows, if it makes any difference.

How to stop Python program execution in IDLE

0

0.099668

1

0

54,617

2,460,401

2010-03-17T07:04:00.000

7

0

1

0

1

python,matplotlib,tkinter,break,python-idle

0

2,460,438

0

4

0

true

0

I have seen this problem with IDLE and matplotlib when using them on Windows. I don't know the exact cause, but Ctrl-c a couple times has typically worked for me. If that doesn't work for you, you can use the normal interpreter instead of write your plot directly to a file instead of the screen. This is one of those (plentiful) times when IDLE doesn't behave like a normal Python script or interpreter session. Because of this, I usually avoid IDLE.

3

11

0

I have a python script that uses plt.show() as it's last instruction. When it runs, IDLE just hangs after the last instruction. I get the image but I don't get the prompt back. On other scripts I typically use ctrl-c to break the program (sometimes doesn't work immediately) but how do I get the prompt back with the plt.show()? Ctrl-c doesn't work... Are there other ways to stop the program? This is IDLE on Windows, if it makes any difference.

How to stop Python program execution in IDLE

0

1.2

1

0

54,617

2,460,401

2010-03-17T07:04:00.000

7

0

1

0

1

python,matplotlib,tkinter,break,python-idle

0

20,615,556

0

4

0

false

0

Ctrl+F6 (Restart shell) or Shell->Restart Shell

3

11

0

I have a python script that uses plt.show() as it's last instruction. When it runs, IDLE just hangs after the last instruction. I get the image but I don't get the prompt back. On other scripts I typically use ctrl-c to break the program (sometimes doesn't work immediately) but how do I get the prompt back with the plt.show()? Ctrl-c doesn't work... Are there other ways to stop the program? This is IDLE on Windows, if it makes any difference.

How to stop Python program execution in IDLE

0

1

0

54,617

2,460,491

2010-03-17T07:28:00.000

1

0

python,mysql,database,datetime,date

0

2,460,546

0

3

0

false

0

Solved. I just did this: datetime.datetime.now() ...insert that into the column.

1

5

0

I am using Python MySQLDB, and I want to insert this into DATETIME field in Mysql . How do I do that with cursor.execute?

In Python, if I have a unix timestamp, how do I insert that into a MySQL datetime field?

0

0.066568

1

0

9,981

2,464,704

2010-03-17T18:09:00.000

1

0

1

python,subprocess,watchdog

0

2,464,752

0

2

0

false

0

I've done this same thing to process web statistics using a semaphore. Essentially, as processes are created, the semaphore is incremented. When they exit, it's decremented. The creation process is blocked when the semaphore blocks. This actually fires off threads, which run external processes down execution path a bit. Here's an example. thread_sem = threading.Semaphore(int(cfg.maxthreads)) for k,v in log_data.items(): thread_list.append(ProcessorThread(int(k), v, thread_sem)) thread_list[-1].start() And then in the constructor for ProcessorThread, I do this: def __init__(self, siteid, data, lock_object): threading.Thread.__init__(self) self.setDaemon(False) self.lock_object = lock_object self.data = data self.siteid = siteid self.lock_object.acquire() When the thread finishes it's task (whether successfully or not), the lock_object is released which allows for another process to begin. HTH

1

2

0

I need it to open 10 processes, and each time one of them finishes I want to wait few seconds and start another one. It seems pretty simple, but somehow I can't get it to work.

How to implement a master/watchdog script in python?

0

0.099668

1

0

1,275

2,465,056

2010-03-17T18:59:00.000

2

0

1

0

python,google-app-engine,artificial-intelligence

0

2,471,015

0

3

0

false

1

0

If the game is turn based then it would probably be best to avoid the Cron task and just update the NPCs every time the player moves. I'm not sure how big of a map you are planning on but you may consider even having the player object find the NPCs that are close to it and call their AI routine. That way NPCs that are out of range of a player wouldn't move at all which may save on resources. Not sure if that matter though.

3

1

0

I am currently in the planning stages of a game for google app engine, but cannot wrap my head around how I am going to handle AI. I intend to have persistant NPCs that will move about the map, but short of writing a program that generates the same XML requests I use to control player actions, than run it on another server I am stuck on how to do it. I have looked at the Task Queue feature, but due to long running processes not being an option on the App engine, I am a little stuck. I intend to run multiple server instances with 200+ persistant NPC entities that I will need to update. Most action is slowly roaming around based on player movements/concentrations, and attacking close range players...(you can probably guess the type of game im developing)

Artificial Intelligence in online game using Google App Engine

0

0.132549

1

0

1,026

2,465,056

2010-03-17T18:59:00.000

2

0

1

0

python,google-app-engine,artificial-intelligence

0

2,471,126

0

3

0

false

1

0

Bear in mind that you can also break up your updates into multiple requests (internally): do a bit of work, redirect to the same handler but different state; do more work; etc. (I'm failing somehow to comment on Peter Recore's answer, which is where this really belongs.) I see that the free service only allows 100k task queue calls/day, so 1 task/NPC would probably use up your resources way too fast. Cron job to do some work/create task queues to update NPCs in appropriately-sized groups? Anyway, just some thoughts; good luck.

3

1

0

I am currently in the planning stages of a game for google app engine, but cannot wrap my head around how I am going to handle AI. I intend to have persistant NPCs that will move about the map, but short of writing a program that generates the same XML requests I use to control player actions, than run it on another server I am stuck on how to do it. I have looked at the Task Queue feature, but due to long running processes not being an option on the App engine, I am a little stuck. I intend to run multiple server instances with 200+ persistant NPC entities that I will need to update. Most action is slowly roaming around based on player movements/concentrations, and attacking close range players...(you can probably guess the type of game im developing)

Artificial Intelligence in online game using Google App Engine

0

0.132549

1

0

1,026

2,465,056

2010-03-17T18:59:00.000

3

0

1

0

python,google-app-engine,artificial-intelligence

0

2,465,142

0

3

0

true

1

0

Will your game be turn based or real time? Either way, I think you have 2 options to look into. One is to use the Cron feature so you can schedule NPC updates at regular intervals, the other is to stick a "update NPCs" task into the Task Queue every time a human player moves.

3

1

0

I am currently in the planning stages of a game for google app engine, but cannot wrap my head around how I am going to handle AI. I intend to have persistant NPCs that will move about the map, but short of writing a program that generates the same XML requests I use to control player actions, than run it on another server I am stuck on how to do it. I have looked at the Task Queue feature, but due to long running processes not being an option on the App engine, I am a little stuck. I intend to run multiple server instances with 200+ persistant NPC entities that I will need to update. Most action is slowly roaming around based on player movements/concentrations, and attacking close range players...(you can probably guess the type of game im developing)

Artificial Intelligence in online game using Google App Engine

0

1.2

1

0

1,026

2,467,609

2010-03-18T04:55:00.000

-6

0

1

0

python,linux

0

2,467,717

0

6

0

false

0

No reason to use python. Avoid writing a shell script in Python and go with something like bash or an equivalent.

2

32

0

How would I download files (video) with Python using wget and save them locally? There will be a bunch of files, so how do I know that one file is downloaded so as to automatically start downloding another one? Thanks.

Using wget via Python

0

-1

1

0

1

92,663

2,467,609

2010-03-18T04:55:00.000

9

0

1

0

python,linux

0

2,467,646

0

6

0

false

0

No reason to use os.system. Avoid writing a shell script in Python and go with something like urllib.urlretrieve or an equivalent. Edit... to answer the second part of your question, you can set up a thread pool using the standard library Queue class. Since you're doing a lot of downloading, the GIL shouldn't be a problem. Generate a list of the URLs you wish to download and feed them to your work queue. It will handle pushing requests to worker threads. I'm waiting for a database update to complete, so I put this together real quick. #!/usr/bin/python import sys import threading import urllib from Queue import Queue import logging class Downloader(threading.Thread): def __init__(self, queue): super(Downloader, self).__init__() self.queue = queue def run(self): while True: download_url, save_as = queue.get() # sentinal if not download_url: return try: urllib.urlretrieve(download_url, filename=save_as) except Exception, e: logging.warn("error downloading %s: %s" % (download_url, e)) if __name__ == '__main__': queue = Queue() threads = [] for i in xrange(5): threads.append(Downloader(queue)) threads[-1].start() for line in sys.stdin: url = line.strip() filename = url.split('/')[-1] print "Download %s as %s" % (url, filename) queue.put((url, filename)) # if we get here, stdin has gotten the ^D print "Finishing current downloads" for i in xrange(5): queue.put((None, None))

2

32

0

How would I download files (video) with Python using wget and save them locally? There will be a bunch of files, so how do I know that one file is downloaded so as to automatically start downloding another one? Thanks.

Using wget via Python

0

1

0

1

92,663

2,469,849

2010-03-18T12:45:00.000

1

0

1

0

python,pydev,enthought

0

9,306,753

0

7

0

false

0

I am running Python 3, so I had to make these changes to get python.exe as my interpreter. File: C:\EasyEclipse-for-LAMP-1.2.2.2\extensions\pydev-1.3.3\eclipse\plugins\org.python.pydev_1.3.3\PySrc\interpreterInfo.py Edit all occurrences of "print ..." to "print(...)" (the ... is whatever is being printed), so wrap it in parentheses. Comment out line 16, since True and False are considered keywords in Python 3. Save, and you should be able to successfully set C:\Python32\python.exe as the interpreter. I kept the default folders checked.

2

16

0

I downloaded Pydev plugin for Eclipse (3.5.2) today on Mac OSX 10.5.8. To be able to use Pydev, I need to configure the interpreter in Eclipse. I am not clear what exactly I need to do here, or what this step does. I want to make sure that when I run programs from Eclipse using Pydev, it uses the Enthought Python Distribution (EPD) I have installed, and can use all the packages that come with EPD. Can someone please tell me simple steps that I need to follow. If I click on autoconfig, it shows a bunch of folders with the path /System/Library/Frameworks/Python.Framework/Versions/2.5/... But I know that the Python that came with EPD is version 2.6.4, so autoconfig is not choosing EPD. Thanks for any help. UPDATE - solution If anyone else is interested in learning how to do this, see the first link in the answer by mlvljr below. Use the solution there EXCEPT that as suggested in the solution, Shift+Cmd+G, did not help me see inside the Python.app package. To look inside it, use the "gear" drop down menu in the Finder and choose "Show Package Contents"

Configuring Pydev Interpreter in Eclipse to use Enthought Python Distribution

0

0.028564

1

0

20,897

2,469,849

2010-03-18T12:45:00.000

12

0

1

0

python,pydev,enthought

0

4,060,609

0

7

0

false

0

Mac OS 10.6.4: Selecting the interpreter as /Library/Frameworks/Python.framework/Versions/2.7/Python did not work. I had to select /Library/Frameworks/Python.framework/Versions/2.7/bin/python

2

16

0

I downloaded Pydev plugin for Eclipse (3.5.2) today on Mac OSX 10.5.8. To be able to use Pydev, I need to configure the interpreter in Eclipse. I am not clear what exactly I need to do here, or what this step does. I want to make sure that when I run programs from Eclipse using Pydev, it uses the Enthought Python Distribution (EPD) I have installed, and can use all the packages that come with EPD. Can someone please tell me simple steps that I need to follow. If I click on autoconfig, it shows a bunch of folders with the path /System/Library/Frameworks/Python.Framework/Versions/2.5/... But I know that the Python that came with EPD is version 2.6.4, so autoconfig is not choosing EPD. Thanks for any help. UPDATE - solution If anyone else is interested in learning how to do this, see the first link in the answer by mlvljr below. Use the solution there EXCEPT that as suggested in the solution, Shift+Cmd+G, did not help me see inside the Python.app package. To look inside it, use the "gear" drop down menu in the Finder and choose "Show Package Contents"

Configuring Pydev Interpreter in Eclipse to use Enthought Python Distribution

0

1

0

20,897

2,476,234

2010-03-19T09:45:00.000

1

0

1

python,twisted,xmpp,irc,fifo

0

2,476,445

0

2

0

false

0

The fifo is the problem. Read from a socket instead. This will fit info the Twisted event-driven model much better. Trying to do things outside the control of the reactor is usually the wrong approach. ---- update based on feedback that the fifo is an external constraint, not avoidable ---- OK, the central issue is that you can not write code in the main (and only) thread of your Twisted app that makes blocking read calls to a fifo. That will cause the whole app to stall if there is nothing to read. So you're either looking at reading the fifo asynchronously, creating a separate thread to read it, or splitting the app in two. The last option is the simplest - modify the Twisted app so that it listens on a socket and write a separate little "forwarder" app that runs in a simple loop, reading the fifo and writing everything it hears to the socket.

2

4

0

Im trying to write some kind of multi protocol bot (jabber/irc) that would read messages from fifo file (one liners mostly) and then send them to irc channel and jabber contacts. So far, I managed to create two factories to connect to jabber and irc, and they seem to be working. However, I've problem with reading the fifo file - I have no idea how to read it in a loop (open file, read line, close file, jump to open file and so on) outside of reactor loop to get the data I need to send, and then get that data to reactor loop for sending in both protocols. I've been looking for information on how to do it in best way, but Im totally lost in the dark. Any suggestion/help would be highly appreciated. Thanks in advance!

Python (Twisted) - reading from fifo and sending read data to multiple protocols

0

0.099668

1

0

1

1,766

2,476,234

2010-03-19T09:45:00.000

3

1

0

1

python,twisted,xmpp,irc,fifo

0

2,478,970

0

2

0

false

0

You can read/write on a file descriptor without blocking the reactor as you do with sockets, by the way doesn't sockets use file descriptors? In your case create a class that implements twisted.internet.interfaces.IReadDescriptor and add to reactor using twisted.internet.interfaces.IReactorFDSet.addReader. For an example of IReadDescriptor implementation look at twisted.internet.tcp.Connection. I cannot be more specific because i never did by my self, but i hope this could be a start point.

2

4

0

Im trying to write some kind of multi protocol bot (jabber/irc) that would read messages from fifo file (one liners mostly) and then send them to irc channel and jabber contacts. So far, I managed to create two factories to connect to jabber and irc, and they seem to be working. However, I've problem with reading the fifo file - I have no idea how to read it in a loop (open file, read line, close file, jump to open file and so on) outside of reactor loop to get the data I need to send, and then get that data to reactor loop for sending in both protocols. I've been looking for information on how to do it in best way, but Im totally lost in the dark. Any suggestion/help would be highly appreciated. Thanks in advance!

Python (Twisted) - reading from fifo and sending read data to multiple protocols

0

0.291313

1

0

1

1,766

2,486,737

2010-03-21T10:41:00.000

3

1

0

python

0

2,486,751

0

3

0

false

0

First you can try psyco, that may give you a speed up as much as 10x, but 2x is more typical If you can post the code up somewhere, perhaps someone can point out how to leverage numpy. If your task doesn't map well only numpy then cython is a good choice to convert a intensive function or two into C code just by adding a few cdefs. If you can show us the code (even just the hot spots) we can probably give you better advice. Perhaps you can modify your algorithm

1

0

I wrote a number crunching python code. The calculations involved can take hours. Is it possible somehow to compile it to binary? Thanks

Convert python script to binary executable

1

0.197375

1

0

2,921

2,487,033

2010-03-21T12:22:00.000

1

0

1

0

python,controls,port,device

0

21,833,149

0

4

0

false

0

but whatever.. someone will look for the answer at some point: I'm on a mac (osx 10.9).. I successfully installed libusb with mac ports, but was getting the "no backend available" message. It's because python can't find the usb dylibs. You have to add the path to your libusb to your $DYLD_LIBRARY_PATH (e.g. /opt/local/lib wherever your macport installed it). As soon I as I added it, pyusb worked fine.

1

7

0

i am using python on ubuntu 9.04 say i have two usb devices connected to a single PC. how can i identify the devices in python code.....for example like if usb port id == A write data to device 1 if usb port id == B write data to device 2 any ideas....

usb device identification

0

0.049958

1

0

39,244

2,488,142

2010-03-21T18:17:00.000

2

0

1

python,django,mod-python

0

2,488,505

0

1

0

false

1

0

There are two obvious reasons to why this might happen: djangobb_forum is not on your Python path There is no __init__.py in the djangobb_forum folder If the code says from djangobb_forum import ... then you need to have the parent folder of djangobb_forum on your Python path.

1

4

0

I've installed Djangobb app on my server (Debian, mod_python) by cloning original source. The only things I've changed is database options in settings.py. All needed components are installed - syncdb query was executed right. But, when I'm trying to enter on my forum, it returns me error: ImproperlyConfigured: Error importing middleware django_authopenid.middleware: "No module named djangobb_forum.subscription" I've checked - djangobb_forum/subscription.py exist, so I don't know what can be wrong. Maybe someone had problems like that and know how to fix it? Sorry for my english.

Djangobb problem

0

0.379949

1

0

1,302

2,488,670

2010-03-21T20:55:00.000

1

0

1

0

python,algorithm,cluster-analysis,character-encoding

0

2,489,898

0

2

0

false

0

You should be able to treat your words as numerals in a strange base. For example, let's say you have a..z as your charset (26 characters), 4 character strings, and you want to distribute among equally 10 machines. Then there are a total of 26^4 strings, so each machine gets 26^4/10 strings. The first machine will get strings 0 through 26^4/10, the next 26^4/10 through 26^4/5, etc. To convert the numbers to strings, just write the number in base 26 using your charset as the numbers. So 0 is 'aaaa' and 26^4/10 = 2*26^3 + 15*26^2 + 15*26 +15 is 'cppp'.

1

0

My question is rather complicated for me to explain, as i'm not really good at maths, but i'll try to be as clear as possible. I'm trying to code a cluster in python, which will generate words given a charset (i.e. with lowercase: aaaa, aaab, aaac, ..., zzzz) and make various operations on them. I'm searching how to calculate, given the charset and the number of nodes, what range each node should work on (i.e.: node1: aaaa-azzz, node2: baaa-czzz, node3: daaa-ezzz, ...). Is it possible to make an algorithm that could compute this, and if it is, how could i implement this in python? I really don't know how to do that, so any help would be much appreciated

python parallel computing: split keyspace to give each node a range to work on

0

0.099668

1

0

260

2,488,710

2010-03-21T21:04:00.000

1

0

python,django,django-admin,shopping-cart,django-nonrel

0

2,488,729

0

3

0

false

1

0

Sounds like you want two related models - Item and Option. Item would contain the name of the item, and Option would contain the option - eg size - and the price of that option. You would then set up your admin to use an inline form for Option.

1

2

0

Basically I am writing a simple shopping cart. Each item can have multiple prices. (i.e. shirts where each size is priced differently). I would like to have a single price field in my admin panel, where when the first price is entered, an additional price field pops up. However I am kind of at a loss as to how to do this. What would be the best way to do this?

django admin - adding fields on the fly

0

0.066568

1

0

515

2,491,819

2010-03-22T11:35:00.000

9

0

1

0

python,class,init

0

2,491,843

0

12

0

false

0

__init__ doesn't return anything and should always return None.

1

140

0

I have a class with an __init__ function. How can I return an integer value from this function when an object is created? I wrote a program, where __init__ does command line parsing and I need to have some value set. Is it OK set it in global variable and use it in other member functions? If so how to do that? So far, I declared a variable outside class. and setting it one function doesn't reflect in other function ??

How to return a value from __init__ in Python?

0

1

0

195,099

2,502,385

2010-03-23T18:02:00.000

0

1

0

python,image,vbscript,batch-file,console-application

0

2,502,963

0

4

0

false

0

1

Try TK, it is included with python. Also, PyGtk is lighter than wxPython, but I ended up bitting the bullet and using wxPython for the same purpose recently, it is heavy, but it didn't have any affect on the script performance.

1

2

0

Any ideas how I can display an image file (bmp or png) centered on the screen as an application splash screen when running a Windows console script based on a batch file, vbscript/wscript or Python console script? I'm not interested in a wxPython solution - that's too much overhead just to implement a cosmetic feature like a splash screen. Thank you, Malcolm

Display an image as a splash screen when running Windows batch file, vbscript/wscript or Python console script

0

1

0

5,541

2,504,386

2010-03-23T23:27:00.000

1

0

python,django,django-models

0

2,504,441

0

3

0

false

1

0

Quoth my elementary chemistry teacher: "If you don't write it down, it didn't happen", therefore save logs in a file. Since the log information is disjoint from your application data (it's meta-data, actually), keep them separate. You could log to a database table but it should be distinct from your model. Text pickle data is difficult for humans to read, binary pickle data even more so; log in an easily parsed format and the data can be imported into analysis software easily.

1

6

0

I have various models of which I would like to keep track and collect statistical data. The problem is how to store the changes throughout time. I thought of various alternative: Storing a log in a TextField, open it and update it every time the model is saved. Alternatively pickle a list and store it in a TextField. Save logs on hard drive. What are your suggestions?

Keeping track of changes - Django

0

0.066568

1

0

1,579

2,531,717

2010-03-28T02:44:00.000

1

0

1

0

python,django,keyword

0

2,531,927

0

2

0

false

0

Abbreviations like NO for navigation officer or OR for operations room need a little care lest you cause a SNAFU ;-) One suspects that better results could be obtained from "Find the NO and send her to the OR" by tagging the words with parts of speech using the context ... hint 1: "the OR" should result in "the [noun]" not "the [conjunction]". Hint 2: if in doubt about a word, keep it as a keyword.

2

1

0

I'm building a website in django that needs to extract key words from short (twitter-like) messages. I've looked at packages like topia.textextract and nltk - but both seem to be overkill for what I need to do. All I need to do is filter words like "and", "or", "not" while keeping nouns and verbs that aren't conjunctives or other parts of speech. Are there any "simpler" packages out there that can do this? EDIT: This needs to be done in near real-time on a production website, so using a keyword extraction service seems out of the question, based on their response times and request throttling.

Key word extraction in Python

0

0.099668

1

0

1,322

2,531,717

2010-03-28T02:44:00.000

3

0

1

0

python,django,keyword

0

2,531,724

0

2

0

true

0

You can make a set sw of the "stop words" you want to eliminate (maybe copy it once and for all from the stop words corpus of NLTK, depending how familiar you are with the various natural languages you need to support), then apply it very simply. E.g., if you have a list of words sent that make up the sentence (shorn of punctuation and lowercased, for simplicity), [word for word in sent if word not in sw] is all you need to make a list of non-stopwords -- could hardly be easier, right? To get the sent list in the first place, using the re module from the standard library, re.findall(r'\w+', sentstring) might suffice if sentstring is the string with the sentence you're dealing with -- it doesn't lowercase, but you can change the list comprehension I suggest above to [word for word in sent if word.lower() not in sw] to compensate for that and (btw) keep the word's original case, which may be useful.

2

1

0

I'm building a website in django that needs to extract key words from short (twitter-like) messages. I've looked at packages like topia.textextract and nltk - but both seem to be overkill for what I need to do. All I need to do is filter words like "and", "or", "not" while keeping nouns and verbs that aren't conjunctives or other parts of speech. Are there any "simpler" packages out there that can do this? EDIT: This needs to be done in near real-time on a production website, so using a keyword extraction service seems out of the question, based on their response times and request throttling.

Key word extraction in Python

0

1.2

1

0

1,322

2,537,065

2010-03-29T10:02:00.000

5

0

1

0

python,django,cgi,webserver,tornado

0

3,244,176

0

2

0

false

1

0

Main feature of Tornado is that it is high performance web-server written in Python, for creating web applications using Python programming language. Running Tornado as CGI application negates the very reason it exists, because running CGI scripts is expensive in terms of performance, and most probably there is no way to run Tornado as CGI script.

1

2

0

Tornado is a webserver + framework like Django but for real-time features. On my server I don't have a python module or wsgi module so I thought CGI. Is there a way to get Tornado ( or Django ) works by using CGI folder ? If yes, Could you explain me how do I do that ?

Tornado or Django works with CGI?

0

0.462117

1

0

1,611

2,541,702

2010-03-29T22:34:00.000

3

0

python,lotus-notes,lotus

0

2,542,163

0

3

0

false

1

0

The short answer is, unfortunately you will need the Notes client installed. There are a few ways to access data from an NSF such as NotesSQL, COM, C/C++, but all rely on the Lotus C API at the core, and you'll need a notes client and a notes ID file to gain access via that API.

3

0

I am looking for a programatic way to access content in a Lotus Notes database (.nsf file) without having Lotus Notes software installed. Python would be preferred but I'm also willing to look at other languages e.g. C/C++ or other means e.g. SQL From what I have read, all of the methods e.g. Python COM access, pyodbc rely on having Lotus Notes server software installed. The problem I am trying to solve is to read the content and look for references (URL's back to a web site that is undergoing maintenance and the addresses in the web site will change) As a start, I want to get a list of references and hope to be able to replace them with the new references to the modified web site. Any ideas on how best to do this welcome :)

Access to content of Lotus Notes database without Lotus Notes software installed

0

0.197375

1

0

3,704

2,541,702

2010-03-29T22:34:00.000

0

python,lotus-notes,lotus

0

2,551,002

0

3

0

false

1

0

Like Ken says, inevitably there has to be a server in the mix. If you're searching for specific text in a Notes / Domino application, and looking to replace it, there's a tool out there which does this: Teamstudio Configurator. Configurator also has an API (written in Lotusscript, which is very like old-skool VB) so you can code a solution pretty quickly. I've done the exact same thing you're doing with an old Domino-based website, using this API. Not the answer you're looking for I guess, but always good to have choices!

3

0

I am looking for a programatic way to access content in a Lotus Notes database (.nsf file) without having Lotus Notes software installed. Python would be preferred but I'm also willing to look at other languages e.g. C/C++ or other means e.g. SQL From what I have read, all of the methods e.g. Python COM access, pyodbc rely on having Lotus Notes server software installed. The problem I am trying to solve is to read the content and look for references (URL's back to a web site that is undergoing maintenance and the addresses in the web site will change) As a start, I want to get a list of references and hope to be able to replace them with the new references to the modified web site. Any ideas on how best to do this welcome :)

Access to content of Lotus Notes database without Lotus Notes software installed

0

1

0

3,704

2,541,702

2010-03-29T22:34:00.000

1

0

python,lotus-notes,lotus

0

2,607,921

0

3

0

false

1

0

If this is a one-time need, you may be able to find sites that will do some simple Domino/Notes hosting for free. If you could put the NSF up to a service like that, you could then use Domino URL's (REST) to extract the data and search for links, etc.

3

0

I am looking for a programatic way to access content in a Lotus Notes database (.nsf file) without having Lotus Notes software installed. Python would be preferred but I'm also willing to look at other languages e.g. C/C++ or other means e.g. SQL From what I have read, all of the methods e.g. Python COM access, pyodbc rely on having Lotus Notes server software installed. The problem I am trying to solve is to read the content and look for references (URL's back to a web site that is undergoing maintenance and the addresses in the web site will change) As a start, I want to get a list of references and hope to be able to replace them with the new references to the modified web site. Any ideas on how best to do this welcome :)

Access to content of Lotus Notes database without Lotus Notes software installed

0

0.066568

1

0

3,704

2,550,308

2010-03-31T03:25:00.000

0

python,django,views

0

2,550,450

0

2

0

false

1

0

whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) So... why not just expect a model instance to be passed in as a parameter? Or a QuerySet from which you will take element 0? Then you can combine it with the QuerySet case, and maybe roll it into get_object_or_404. My suggestion is to look at how Django's generic views are written. They're solving the same general class of problems you are. You seem most of the way there, except for the last part.

2

0

These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal? Edit/answering my own question partially: signals: the view should emit a signal when it starts and one before it returns the response

how to write re-usable views in django?

0

1

0

151

2,550,308

2010-03-31T03:25:00.000

0

python,django,views

0

2,550,339

0

2

0

false

1

0

I would think that doing all of those puts a large burden on your urlconf to get everything right. Perhaps making a function that takes all that and hardcoding your views to be a glorified wrapper around said function would be better.

2

0

These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal? Edit/answering my own question partially: signals: the view should emit a signal when it starts and one before it returns the response

how to write re-usable views in django?

0

1

0

151

2,550,370

2010-03-31T03:45:00.000

3

0

1

0

c#,visual-studio,ironpython,ironruby

0

2,550,627

0

2

0

true

0

1

You can't add reference to a project since it's a Visual Studio thing. I suggest that during the development process, call import (IronPython) or require (IronRuby) with the full path of your project assembly like c:\dev\MyProject\bin\Debug\MyProject.dll.

1

2

0

I know how to reference an existing .dll to IronPython, but is there any way to add my project as a reference like I can between Visual Studio projects? Or is it best practice to create a separate class library?

Any way to add my C# project as a reference in IronPython / IronRuby?

1

1.2

1

0

1,069

2,553,088

2010-03-31T13:04:00.000

2

0

1

python,django,django-admin

0

2,553,104

0

4

0

false

1

0

do you have permission to write to the directory?

2

0

1

I'm totally new to django, and I'm using its documentation to get help on how to use it but seems like something is missing. i installed django using setup.py install command and i added the ( django/bin ) to system path variable but. i still cant start a new project i use the following syntax to start a project : django-admin.py startproject myNewProject but it says Type 'django-admin.py help' for usage. 1 UPDATES : i use windows vista x64 . i checked the environment variables and i don't have DJANGO_SETTINGS_MODULE variable in there . should i add one ?? and with what value ? do i miss anything ? thank u

Django newbie question: can't start a new project

0

0.099668

1

0

2,582

2,553,088

2010-03-31T13:04:00.000

0

1

python,django,django-admin

0

2,559,610

0

4

0

false

1

0

check whether you have djagno or not and the it is in python path or not.if using linux go to terminal type python and then try to import django

2

0

1

I'm totally new to django, and I'm using its documentation to get help on how to use it but seems like something is missing. i installed django using setup.py install command and i added the ( django/bin ) to system path variable but. i still cant start a new project i use the following syntax to start a project : django-admin.py startproject myNewProject but it says Type 'django-admin.py help' for usage. 1 UPDATES : i use windows vista x64 . i checked the environment variables and i don't have DJANGO_SETTINGS_MODULE variable in there . should i add one ?? and with what value ? do i miss anything ? thank u

Django newbie question: can't start a new project

0

1

0

2,582

2,561,542

2010-04-01T15:28:00.000

3

0

1

0

python,eclipse,wxpython

0

12,983,874

0

3

0

false

0

1

wxPython install by default to the following path /usr/local/lib/wxPython-2.9.4.0 When adding a path to the Interpreter libraries section in the eclipse preferences add this path: /usr/local/lib/wxPython-2.9.4.0/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa

2

3

0

1

I've been browsing documentation, but haven't been able to find a straightforward tutorial, so I apologize if this is a really simple question. Anyway, I have eclipse with pydev installed on MAC OSX, and I want configure wxPython to work with eclipse, how do I do this? Once I've downloaded wxpython, what steps do I take to allow wxPython development from eclipse? Thanks!

Configuring Eclipse with wxPython

0

0.197375

1

0

8,700

2,561,542

2010-04-01T15:28:00.000

7

0

1

0

python,eclipse,wxpython

0

2,562,141

0

3

0

false

0

1

Vinay's answer above is correct. However, if code completion is not picking it up, you might need to add the WX directory to the Pydev's interpreter library path. Window | Preferences | Pydev | Interpreter - Python | Libraries If wx is not present, New Folder and select the install directory.

2

3

0

1

I've been browsing documentation, but haven't been able to find a straightforward tutorial, so I apologize if this is a really simple question. Anyway, I have eclipse with pydev installed on MAC OSX, and I want configure wxPython to work with eclipse, how do I do this? Once I've downloaded wxpython, what steps do I take to allow wxPython development from eclipse? Thanks!

Configuring Eclipse with wxPython

0

1

0

8,700

2,563,788

2010-04-01T21:22:00.000

0

1

0

python,windows,audio,pywin32

0

10,114,610

0

3

0

true

0

PyAudiere turns out to be the most convenient. It allows me to simply play an MP3, rather than generate the sound on the fly.

1

3

0

I am trying to get python to make noise when certain things happen. Preferably, i would like to play music of some kind, however some kind of distinctive beeping would be sufficient, like an electronic timer going off. I have thus far only been able to make the system speaker chime using pywin32's Beep, however this simply does not have the volume for my application. Any ideas on how I can do this? EDIT: I have been using PyAudiere for this, but unfortunately the package has been abandoned. Now I need an alternative.

Making Noise with Python

0

1.2

1

0

1,463

2,565,776

2010-04-02T08:43:00.000

0

python,wxpython,cursor

0

2,565,793

0

2

0

true

1

0

Use two cursors and change them on events as they need to be.

1

0

I want to use the google maps hand cursor in Python but I don't know how to do it. I've downloaded the cursor but I only get to use the hand open, I also have a event that "closes" the hand when clicked but I don't know how can I change the style cursor on it. I say this because the google maps hand cursor has two style (the open and the closed hand). If you don't know how to use the other style you can also tell me how can I create another cursor where the close hand is the default style. If I have that, I only change the cursor and it's done. Thanks in advance :)

How use the google maps hand cursor in Python?

0

1.2

1

0

593

2,569,503

2010-04-02T22:21:00.000

3

0

1

0

python,hash,mixed-case

0

2,569,508

0

2

0

true

0

you can base64 encode the output of the hash. This has a couple of additional characters beyond those you mentioned.

1

0

I am having a hard time figuring out a reasonable way to generate a mixed-case hash in Python. I want to generate something like: aZeEe9E Right now I'm using MD5, which doesn't generate case-sensitive hashes. Do any of you know how to generate a hash value consisting of upper- and lower- case characters + numbers? - Okay, GregS's advice worked like a charm (on the first try!): Here is a simple example: >>> import hashlib, base64 >>> s = 'http://gooogle.com' >>> hash = hashlib.md5(s).digest() >>> print hash 46c4f333fae34078a68393213bb9272d >>> print base64.b64encode(hash) NDZjNGYzMzNmYWUzNDA3OGE2ODM5MzIxM2JiOTI3MmQ=

How to generate a mixed-case hash in Python?

0

1.2

1

0

1,256

2,570,193

2010-04-03T04:03:00.000

0

python,django,twitter

0

2,570,547

0

3

0

false

1

0

I'm not sure exactly what you're asking, but what's wrong with something like {{ user.get_absolute_url }}? For the tag detail URLs, it really depends on what you're looking for, but you would have to construct the url and view for that yourself.

1

0

I'm writing a twitter-like note-taking web app. In a page the latest 20 notes of the user will be listed, and when the user scroll to the bottom of the browser window more items will be loaded and rendered. The initial 20 notes are part of the generated html of my django template, but the other dynamically loaded items are in json format. I want to know how do I do the tag-and-username converting consistently. Thanks in advance.

How to convert tag-and-username-like text into proper links in a twitter message?

0

1

0

207

2,573,135

2010-04-04T00:28:00.000

2

1

0

python

0

2,573,225

0

19

0

false

0

Not precisely what you're asking for, but I think it's good advice. Learn another language, doesn't matter too much which. Each language has it's own ideas and conventions that you can learn from. Learn about the differences in the languages and more importantly why they're different. Try a purely functional language like Haskell and see some of the benefits (and challenges) of functions free of side-effects. See how you can apply some of the things you learn from other languages to Python.

5

659

0

I've been learning, working, and playing with Python for a year and a half now. As a biologist slowly making the turn to bio-informatics, this language has been at the very core of all the major contributions I have made in the lab. I more or less fell in love with the way Python permits me to express beautiful solutions and also with the semantics of the language that allows such a natural flow from thoughts to workable code. What I would like to know is your answer to a kind of question I have seldom seen in this or other forums. This question seems central to me for anyone on the path to Python improvement but who wonders what his next steps should be. Let me sum up what I do NOT want to ask first ;) I don't want to know how to QUICKLY learn Python Nor do I want to find out the best way to get acquainted with the language Finally, I don't want to know a 'one trick that does it all' approach. What I do want to know your opinion about, is: What are the steps YOU would recommend to a Python journeyman, from apprenticeship to guru status (feel free to stop wherever your expertise dictates it), in order that one IMPROVES CONSTANTLY, becoming a better and better Python coder, one step at a time. Some of the people on SO almost seem worthy of worship for their Python prowess, please enlighten us :) The kind of answers I would enjoy (but feel free to surprise the readership :P ), is formatted more or less like this: Read this (eg: python tutorial), pay attention to that kind of details Code for so manytime/problems/lines of code Then, read this (eg: this or that book), but this time, pay attention to this Tackle a few real-life problems Then, proceed to reading Y. Be sure to grasp these concepts Code for X time Come back to such and such basics or move further to... (you get the point :) I really care about knowing your opinion on what exactly one should pay attention to, at various stages, in order to progress CONSTANTLY (with due efforts, of course). If you come from a specific field of expertise, discuss the path you see as appropriate in this field. EDIT: Thanks to your great input, I'm back on the Python improvement track! I really appreciate!

Python progression path - From apprentice to guru

0

0.02105

1

0

383,814

2,573,135

2010-04-04T00:28:00.000

24

1

0

python

0

4,147,969

0

19

0

false

0

If you're in and using python for science (which it seems you are) part of that will be learning and understanding scientific libraries, for me these would be numpy scipy matplotlib mayavi/mlab chaco Cython knowing how to use the right libraries and vectorize your code is essential for scientific computing. I wanted to add that, handling large numeric datasets in common pythonic ways(object oriented approaches, lists, iterators) can be extremely inefficient. In scientific computing, it can be necessary to structure your code in ways that differ drastically from how most conventional python coders approach data.

5

659

0

I've been learning, working, and playing with Python for a year and a half now. As a biologist slowly making the turn to bio-informatics, this language has been at the very core of all the major contributions I have made in the lab. I more or less fell in love with the way Python permits me to express beautiful solutions and also with the semantics of the language that allows such a natural flow from thoughts to workable code. What I would like to know is your answer to a kind of question I have seldom seen in this or other forums. This question seems central to me for anyone on the path to Python improvement but who wonders what his next steps should be. Let me sum up what I do NOT want to ask first ;) I don't want to know how to QUICKLY learn Python Nor do I want to find out the best way to get acquainted with the language Finally, I don't want to know a 'one trick that does it all' approach. What I do want to know your opinion about, is: What are the steps YOU would recommend to a Python journeyman, from apprenticeship to guru status (feel free to stop wherever your expertise dictates it), in order that one IMPROVES CONSTANTLY, becoming a better and better Python coder, one step at a time. Some of the people on SO almost seem worthy of worship for their Python prowess, please enlighten us :) The kind of answers I would enjoy (but feel free to surprise the readership :P ), is formatted more or less like this: Read this (eg: python tutorial), pay attention to that kind of details Code for so manytime/problems/lines of code Then, read this (eg: this or that book), but this time, pay attention to this Tackle a few real-life problems Then, proceed to reading Y. Be sure to grasp these concepts Code for X time Come back to such and such basics or move further to... (you get the point :) I really care about knowing your opinion on what exactly one should pay attention to, at various stages, in order to progress CONSTANTLY (with due efforts, of course). If you come from a specific field of expertise, discuss the path you see as appropriate in this field. EDIT: Thanks to your great input, I'm back on the Python improvement track! I really appreciate!

Python progression path - From apprentice to guru

0

1

0

383,814

2,573,135

2010-04-04T00:28:00.000

41

1

0

python

0

2,576,226

0

19

0

false

0

I'll give you the simplest and most effective piece of advice I think anybody could give you: code. You can only be better at using a language (which implies understanding it) by coding. You have to actively enjoy coding, be inspired, ask questions, and find answers by yourself. Got a an hour to spare? Write code that will reverse a string, and find out the most optimum solution. A free evening? Why not try some web-scraping. Read other peoples code. See how they do things. Ask yourself what you would do. When I'm bored at my computer, I open my IDE and code-storm. I jot down ideas that sound interesting, and challenging. An URL shortener? Sure, I can do that. Oh, I learnt how to convert numbers from one base to another as a side effect! This is valid whatever your skill level. You never stop learning. By actively coding in your spare time you will, with little additional effort, come to understand the language, and ultimately, become a guru. You will build up knowledge and reusable code and memorise idioms.

5

659

0

I've been learning, working, and playing with Python for a year and a half now. As a biologist slowly making the turn to bio-informatics, this language has been at the very core of all the major contributions I have made in the lab. I more or less fell in love with the way Python permits me to express beautiful solutions and also with the semantics of the language that allows such a natural flow from thoughts to workable code. What I would like to know is your answer to a kind of question I have seldom seen in this or other forums. This question seems central to me for anyone on the path to Python improvement but who wonders what his next steps should be. Let me sum up what I do NOT want to ask first ;) I don't want to know how to QUICKLY learn Python Nor do I want to find out the best way to get acquainted with the language Finally, I don't want to know a 'one trick that does it all' approach. What I do want to know your opinion about, is: What are the steps YOU would recommend to a Python journeyman, from apprenticeship to guru status (feel free to stop wherever your expertise dictates it), in order that one IMPROVES CONSTANTLY, becoming a better and better Python coder, one step at a time. Some of the people on SO almost seem worthy of worship for their Python prowess, please enlighten us :) The kind of answers I would enjoy (but feel free to surprise the readership :P ), is formatted more or less like this: Read this (eg: python tutorial), pay attention to that kind of details Code for so manytime/problems/lines of code Then, read this (eg: this or that book), but this time, pay attention to this Tackle a few real-life problems Then, proceed to reading Y. Be sure to grasp these concepts Code for X time Come back to such and such basics or move further to... (you get the point :) I really care about knowing your opinion on what exactly one should pay attention to, at various stages, in order to progress CONSTANTLY (with due efforts, of course). If you come from a specific field of expertise, discuss the path you see as appropriate in this field. EDIT: Thanks to your great input, I'm back on the Python improvement track! I really appreciate!

Python progression path - From apprentice to guru

0

1

0

383,814

2,573,135

2010-04-04T00:28:00.000

12

1

0

python

0

2,573,531

0

19

0

false

0

Thoroughly Understand All Data Types and Structures For every type and structure, write a series of demo programs that exercise every aspect of the type or data structure. If you do this, it might be worthwhile to blog notes on each one... it might be useful to lots of people!

5

659

0

I've been learning, working, and playing with Python for a year and a half now. As a biologist slowly making the turn to bio-informatics, this language has been at the very core of all the major contributions I have made in the lab. I more or less fell in love with the way Python permits me to express beautiful solutions and also with the semantics of the language that allows such a natural flow from thoughts to workable code. What I would like to know is your answer to a kind of question I have seldom seen in this or other forums. This question seems central to me for anyone on the path to Python improvement but who wonders what his next steps should be. Let me sum up what I do NOT want to ask first ;) I don't want to know how to QUICKLY learn Python Nor do I want to find out the best way to get acquainted with the language Finally, I don't want to know a 'one trick that does it all' approach. What I do want to know your opinion about, is: What are the steps YOU would recommend to a Python journeyman, from apprenticeship to guru status (feel free to stop wherever your expertise dictates it), in order that one IMPROVES CONSTANTLY, becoming a better and better Python coder, one step at a time. Some of the people on SO almost seem worthy of worship for their Python prowess, please enlighten us :) The kind of answers I would enjoy (but feel free to surprise the readership :P ), is formatted more or less like this: Read this (eg: python tutorial), pay attention to that kind of details Code for so manytime/problems/lines of code Then, read this (eg: this or that book), but this time, pay attention to this Tackle a few real-life problems Then, proceed to reading Y. Be sure to grasp these concepts Code for X time Come back to such and such basics or move further to... (you get the point :) I really care about knowing your opinion on what exactly one should pay attention to, at various stages, in order to progress CONSTANTLY (with due efforts, of course). If you come from a specific field of expertise, discuss the path you see as appropriate in this field. EDIT: Thanks to your great input, I'm back on the Python improvement track! I really appreciate!

Python progression path - From apprentice to guru

0

1

0

383,814