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pythondev
help
Any ideas where to start?
2019-05-10T16:18:03.258000
Tyson
pythondev_help_Tyson_2019-05-10T16:18:03.258000
1,557,505,083.258
23,121
pythondev
help
I think you would want a wrapper that mapped the multi-keys to a single shared key before hitting the LRUChache decorated object
2019-05-10T16:19:00.258800
Clemmie
pythondev_help_Clemmie_2019-05-10T16:19:00.258800
1,557,505,140.2588
23,122
pythondev
help
hmm... that would be possible if I'd knew all possible keys in advance
2019-05-10T16:20:54.259300
Tyson
pythondev_help_Tyson_2019-05-10T16:20:54.259300
1,557,505,254.2593
23,123
pythondev
help
e.g. just hash them all together
2019-05-10T16:21:01.259500
Tyson
pythondev_help_Tyson_2019-05-10T16:21:01.259500
1,557,505,261.2595
23,124
pythondev
help
the flow is like that: a user requests a object by key. if the object exists in the cache, it's returned
2019-05-10T16:22:55.262000
Tyson
pythondev_help_Tyson_2019-05-10T16:22:55.262000
1,557,505,375.262
23,125
pythondev
help
another user reuqests the object but using a different key (e.g. a different, unique property)
2019-05-10T16:23:14.262600
Tyson
pythondev_help_Tyson_2019-05-10T16:23:14.262600
1,557,505,394.2626
23,126
pythondev
help
the object is already in cache
2019-05-10T16:23:22.262800
Tyson
pythondev_help_Tyson_2019-05-10T16:23:22.262800
1,557,505,402.2628
23,127
pythondev
help
the trouble is that LRUCache maps the function call to the return value, so if you have a different function call (different key in param) it will be different - even keyword order on calling can be a different entry `f(a=1, b=2)` might not hit the cache of `f(b=2, a=1)`
2019-05-10T16:23:27.263100
Clemmie
pythondev_help_Clemmie_2019-05-10T16:23:27.263100
1,557,505,407.2631
23,128
pythondev
help
What if you load the file into the script make the changes and just rewrite that way the order and formatting are retained?
2019-05-10T16:23:38.263400
Holly
pythondev_help_Holly_2019-05-10T16:23:38.263400
1,557,505,418.2634
23,129
pythondev
help
so, after I found the matching object I'd like to add the second key so it can be found if the next user requests the object using one of the two keys we know so far
2019-05-10T16:23:57.264100
Tyson
pythondev_help_Tyson_2019-05-10T16:23:57.264100
1,557,505,437.2641
23,130
pythondev
help
is there a computation taking place, or just a lookup?
2019-05-10T16:24:41.264700
Clemmie
pythondev_help_Clemmie_2019-05-10T16:24:41.264700
1,557,505,481.2647
23,131
pythondev
help
lookup
2019-05-10T16:24:51.265100
Tyson
pythondev_help_Tyson_2019-05-10T16:24:51.265100
1,557,505,491.2651
23,132
pythondev
help
and some read io
2019-05-10T16:24:59.265500
Tyson
pythondev_help_Tyson_2019-05-10T16:24:59.265500
1,557,505,499.2655
23,133
pythondev
help
LRUCache is really for computation heavy functions. It won’t give you anything for lookups
2019-05-10T16:25:00.265600
Clemmie
pythondev_help_Clemmie_2019-05-10T16:25:00.265600
1,557,505,500.2656
23,134
pythondev
help
I just wanted to dump all stuff into memory so I don't have to read from disk for every request
2019-05-10T16:25:33.266300
Tyson
pythondev_help_Tyson_2019-05-10T16:25:33.266300
1,557,505,533.2663
23,135
pythondev
help
thought a simply dict would do it
2019-05-10T16:25:50.266600
Tyson
pythondev_help_Tyson_2019-05-10T16:25:50.266600
1,557,505,550.2666
23,136
pythondev
help
I want to limit it's size
2019-05-10T16:25:55.266900
Tyson
pythondev_help_Tyson_2019-05-10T16:25:55.266900
1,557,505,555.2669
23,137
pythondev
help
LRU seems like a nice strategy
2019-05-10T16:26:02.267300
Tyson
pythondev_help_Tyson_2019-05-10T16:26:02.267300
1,557,505,562.2673
23,138
pythondev
help
also: concurrent access could be an issue
2019-05-10T16:26:29.268200
Tyson
pythondev_help_Tyson_2019-05-10T16:26:29.268200
1,557,505,589.2682
23,139
pythondev
help
sure, you can build a cache to do it, and mimic the functionality of LRUCache, but you will need to build you own tooling
2019-05-10T16:26:29.268300
Clemmie
pythondev_help_Clemmie_2019-05-10T16:26:29.268300
1,557,505,589.2683
23,140
pythondev
help
I see. okay, good to know. So at least I know LRUCache will most probably be a dead end
2019-05-10T16:27:13.269100
Tyson
pythondev_help_Tyson_2019-05-10T16:27:13.269100
1,557,505,633.2691
23,141
pythondev
help
None
2019-05-10T16:46:27.269200
Rodrick
pythondev_help_Rodrick_2019-05-10T16:46:27.269200
1,557,506,787.2692
23,142
pythondev
help
I keep getting an error that the range is to much because it splits it at the `.`
2019-05-10T16:47:04.270100
Rodrick
pythondev_help_Rodrick_2019-05-10T16:47:04.270100
1,557,506,824.2701
23,143
pythondev
help
How can I get the last value
2019-05-10T16:47:24.270400
Rodrick
pythondev_help_Rodrick_2019-05-10T16:47:24.270400
1,557,506,844.2704
23,144
pythondev
help
`f.split('.'][-1]`
2019-05-10T16:47:48.270800
Hiroko
pythondev_help_Hiroko_2019-05-10T16:47:48.270800
1,557,506,868.2708
23,145
pythondev
help
What does the -1 do
2019-05-10T16:48:09.271200
Rodrick
pythondev_help_Rodrick_2019-05-10T16:48:09.271200
1,557,506,889.2712
23,146
pythondev
help
Idk waht it does but it works
2019-05-10T16:48:33.271500
Rodrick
pythondev_help_Rodrick_2019-05-10T16:48:33.271500
1,557,506,913.2715
23,147
pythondev
help
what*
2019-05-10T16:48:37.271800
Rodrick
pythondev_help_Rodrick_2019-05-10T16:48:37.271800
1,557,506,917.2718
23,148
pythondev
help
it reads last element of list
2019-05-10T16:48:42.271900
Raguel
pythondev_help_Raguel_2019-05-10T16:48:42.271900
1,557,506,922.2719
23,149
pythondev
help
basically it starts from last element
2019-05-10T16:48:54.272300
Raguel
pythondev_help_Raguel_2019-05-10T16:48:54.272300
1,557,506,934.2723
23,150
pythondev
help
ahhhh
2019-05-10T16:49:10.272800
Rodrick
pythondev_help_Rodrick_2019-05-10T16:49:10.272800
1,557,506,950.2728
23,151
pythondev
help
you should try this with your lists to get better understanding how slicing works
2019-05-10T16:49:29.273300
Raguel
pythondev_help_Raguel_2019-05-10T16:49:29.273300
1,557,506,969.2733
23,152
pythondev
help
`files[0]`, `files[-1]` etc
2019-05-10T16:49:50.273800
Raguel
pythondev_help_Raguel_2019-05-10T16:49:50.273800
1,557,506,990.2738
23,153
pythondev
help
Ok
2019-05-10T16:50:05.274000
Rodrick
pythondev_help_Rodrick_2019-05-10T16:50:05.274000
1,557,507,005.274
23,154
pythondev
help
within `BurnIn()` is a function called `report()`. `report()`has a variable `output_csv` when searching for how to reference this variable, it tells me to implement it like line 5 `device.output_csv` but doing that my editor yells at me and doesnt run. What am i doing wrong?
2019-05-10T21:49:09.274600
Priscilla
pythondev_help_Priscilla_2019-05-10T21:49:09.274600
1,557,524,949.2746
23,155
pythondev
help
Your `report()` function would want to store the output in `self.output_csv`. If it's just a function-local variable, it disappears when the function exits.
2019-05-10T22:18:33.276700
Sasha
pythondev_help_Sasha_2019-05-10T22:18:33.276700
1,557,526,713.2767
23,156
pythondev
help
yeah it is a local variable and i do need it to disappear, looks like i need a workaround.
2019-05-10T22:19:56.277700
Priscilla
pythondev_help_Priscilla_2019-05-10T22:19:56.277700
1,557,526,796.2777
23,157
pythondev
help
Can you clarify why you need it to disappear?
2019-05-10T22:20:15.278200
Sasha
pythondev_help_Sasha_2019-05-10T22:20:15.278200
1,557,526,815.2782
23,158
pythondev
help
Looks like you need it to remain around for a while, to write it.
2019-05-10T22:20:27.278600
Sasha
pythondev_help_Sasha_2019-05-10T22:20:27.278600
1,557,526,827.2786
23,159
pythondev
help
so i updated it with the timed loop I need the for loop to run within. there is another loop inside of the function `report()` I need to write it after the time loops finish, so I took the write statment out of the `report()` function.
2019-05-10T22:23:13.280300
Priscilla
pythondev_help_Priscilla_2019-05-10T22:23:13.280300
1,557,526,993.2803
23,160
pythondev
help
here is the function
2019-05-10T22:23:59.280700
Priscilla
pythondev_help_Priscilla_2019-05-10T22:23:59.280700
1,557,527,039.2807
23,161
pythondev
help
Do you need the output to be a combination of all of the output from the different serials, and write it when all of them are done?
2019-05-10T22:25:47.282000
Sasha
pythondev_help_Sasha_2019-05-10T22:25:47.282000
1,557,527,147.282
23,162
pythondev
help
yes
2019-05-10T22:26:22.282200
Priscilla
pythondev_help_Priscilla_2019-05-10T22:26:22.282200
1,557,527,182.2822
23,163
pythondev
help
Okay, in that case you need to have `output_csv` be a variable in your top-level code, and have each device return their part to be appended. For instance, in `report()` you would have `return output_str, output_csv`, and in the outer loop you'd have something like: ```output_csv = '' for s in serials: device = BurnIn(s, usr) output, csv = device.report() print(output) output_csv += csv with open('csvfile.csv', 'a') as f: f.write(output_csv)```
2019-05-10T22:29:20.285100
Sasha
pythondev_help_Sasha_2019-05-10T22:29:20.285100
1,557,527,360.2851
23,164
pythondev
help
However, I might reconsider the requirement to write the output at the very end. With append mode, you can write as you go, and it might suck to lose all your data if the program crashes before it finishes.
2019-05-10T22:32:24.287400
Sasha
pythondev_help_Sasha_2019-05-10T22:32:24.287400
1,557,527,544.2874
23,165
pythondev
help
ok, now that was one of my first plans. the problem is that `report()` does not return `output` it returns a similar string with spaces in it to display a kind of "table" so its not really comma seperated.
2019-05-10T22:34:35.288400
Priscilla
pythondev_help_Priscilla_2019-05-10T22:34:35.288400
1,557,527,675.2884
23,166
pythondev
help
and i will take your advice on appending, instead of writting.
2019-05-10T22:35:04.288900
Priscilla
pythondev_help_Priscilla_2019-05-10T22:35:04.288900
1,557,527,704.2889
23,167
pythondev
help
because it prints out the statuse every minute, but only appends to the csv after the full 24 hours have finished
2019-05-10T22:37:18.289700
Priscilla
pythondev_help_Priscilla_2019-05-10T22:37:18.289700
1,557,527,838.2897
23,168
pythondev
help
That's why I said you should `return output_str, output_csv` in `report()`, to get access to both the printable text and the CSV data.
2019-05-10T22:38:47.290400
Sasha
pythondev_help_Sasha_2019-05-10T22:38:47.290400
1,557,527,927.2904
23,169
pythondev
help
how neat, how does it know to assign to `output` and `csv` respectively?
2019-05-10T22:46:31.291900
Priscilla
pythondev_help_Priscilla_2019-05-10T22:46:31.291900
1,557,528,391.2919
23,170
pythondev
help
oh, `output, csv = ...` and `return output, csv` i guess
2019-05-10T22:47:11.292600
Priscilla
pythondev_help_Priscilla_2019-05-10T22:47:11.292600
1,557,528,431.2926
23,171
pythondev
help
Yep. It's actually returning a 2-element tuple, and unpacking it when you assign the return value to 2 variables.
2019-05-10T22:48:06.293300
Sasha
pythondev_help_Sasha_2019-05-10T22:48:06.293300
1,557,528,486.2933
23,172
pythondev
help
very cool
2019-05-10T22:51:46.293900
Priscilla
pythondev_help_Priscilla_2019-05-10T22:51:46.293900
1,557,528,706.2939
23,173
pythondev
help
That’s why a stray comma can make your code behave in unexpected ways. `x = 1,` means `x = (1, )` (a tuple, not an int)
2019-05-10T22:53:44.294700
Hsiu
pythondev_help_Hsiu_2019-05-10T22:53:44.294700
1,557,528,824.2947
23,174
pythondev
help
that makes a lot of sense
2019-05-10T23:18:56.295000
Priscilla
pythondev_help_Priscilla_2019-05-10T23:18:56.295000
1,557,530,336.295
23,175
pythondev
help
for some reason this ``` def keypad_sim(self): ser_menu = 'PASS' self.keypad_sim_list.append(ser_menu) ``` gives me a `memory error` i guess its from ram getting full. I have never had to handle anything like that, are lists not supposed to get very long?
2019-05-10T23:30:35.295800
Priscilla
pythondev_help_Priscilla_2019-05-10T23:30:35.295800
1,557,531,035.2958
23,176
pythondev
help
hi, can anyone tell me what does "data normalization" mean in machine learning?
2019-05-10T23:57:32.296800
Alishia
pythondev_help_Alishia_2019-05-10T23:57:32.296800
1,557,532,652.2968
23,177
pythondev
help
<@Priscilla> They can get quite long, but you can certainly fill up memory if you have an extremely long loop. Maybe print out `len(self.keypad_sim_list)` to see how much it's growing?
2019-05-11T00:10:05.298000
Sasha
pythondev_help_Sasha_2019-05-11T00:10:05.298000
1,557,533,405.298
23,178
pythondev
help
<@Alishia> Usually that would mean re-scaling numbers to a common range, so that you don't have one feature which is 9,000,000,000 and another one which is 0.0000002 trying to be mixed together.
2019-05-11T00:12:40.299400
Sasha
pythondev_help_Sasha_2019-05-11T00:12:40.299400
1,557,533,560.2994
23,179
pythondev
help
The guys in <#C0JB9ATQV|data_science> may be able to give you some more details.
2019-05-11T00:13:19.299900
Sasha
pythondev_help_Sasha_2019-05-11T00:13:19.299900
1,557,533,599.2999
23,180
pythondev
help
thanks <@Sasha> i didn't realize there's a data science channel. Cheers
2019-05-11T00:19:32.300600
Alishia
pythondev_help_Alishia_2019-05-11T00:19:32.300600
1,557,533,972.3006
23,181
pythondev
help
English-related question: "applicant" vs "applier", which one you usually use to describe a person who seeks for a job? Or they're interchangeable?
2019-05-11T01:35:16.301800
Chester
pythondev_help_Chester_2019-05-11T01:35:16.301800
1,557,538,516.3018
23,182
pythondev
help
I'd say "applicant" is the better term.
2019-05-11T01:36:23.302200
Sasha
pythondev_help_Sasha_2019-05-11T01:36:23.302200
1,557,538,583.3022
23,183
pythondev
help
When doc (<https://pypi.org/project/PyMySQL/#installation>) says to run `python3 -m pip install PyMySQL[rsa]` and I run the same. I get an error: ``` pip install PyMySQL[rsa] zsh: no matches found: PyMySQL[rsa] ```
2019-05-11T01:56:19.303600
Cordell
pythondev_help_Cordell_2019-05-11T01:56:19.303600
1,557,539,779.3036
23,184
pythondev
help
What is wrong here?
2019-05-11T01:56:47.304000
Cordell
pythondev_help_Cordell_2019-05-11T01:56:47.304000
1,557,539,807.304
23,185
pythondev
help
Maybe try `'PyMySQL[rsa]'` with quotes? Your shell may be trying a wildcard expansion with the brackets.
2019-05-11T02:04:31.304900
Sasha
pythondev_help_Sasha_2019-05-11T02:04:31.304900
1,557,540,271.3049
23,186
pythondev
help
ok
2019-05-11T02:05:36.305100
Cordell
pythondev_help_Cordell_2019-05-11T02:05:36.305100
1,557,540,336.3051
23,187
pythondev
help
thanks <@Sasha> .. It worked
2019-05-11T02:06:10.305300
Cordell
pythondev_help_Cordell_2019-05-11T02:06:10.305300
1,557,540,370.3053
23,188
pythondev
help
In chained method calls e.g. `"".join(char_list).lower()` what is the order of evaluation? I presume it's left to right but am trying to figure out how to confirm. Any link for further reading?
2019-05-11T13:08:10.309400
Lory
pythondev_help_Lory_2019-05-11T13:08:10.309400
1,557,580,090.3094
23,189
pythondev
help
Left to right is correct
2019-05-11T13:17:47.309900
Hiroko
pythondev_help_Hiroko_2019-05-11T13:17:47.309900
1,557,580,667.3099
23,190
pythondev
help
And it only works if the return from the previous includes the following method
2019-05-11T13:18:14.310700
Hiroko
pythondev_help_Hiroko_2019-05-11T13:18:14.310700
1,557,580,694.3107
23,191
pythondev
help
thanks
2019-05-11T13:26:00.310900
Lory
pythondev_help_Lory_2019-05-11T13:26:00.310900
1,557,581,160.3109
23,192
pythondev
help
so just to be clear, in my example, `lower()` is never called until the string is fully constructed
2019-05-11T13:26:55.311500
Lory
pythondev_help_Lory_2019-05-11T13:26:55.311500
1,557,581,215.3115
23,193
pythondev
help
Correct
2019-05-11T13:39:20.311700
Hiroko
pythondev_help_Hiroko_2019-05-11T13:39:20.311700
1,557,581,960.3117
23,194
pythondev
help
we got a walrus operator but no pipe operator :cry:
2019-05-11T13:46:22.312200
Bethany
pythondev_help_Bethany_2019-05-11T13:46:22.312200
1,557,582,382.3122
23,195
pythondev
help
<@Bethany> <https://hackernoon.com/adding-a-pipe-operator-to-python-19a3aa295642>
2019-05-11T13:59:19.312500
Hiroko
pythondev_help_Hiroko_2019-05-11T13:59:19.312500
1,557,583,159.3125
23,196
pythondev
help
how do I actually verify a `checksum` when I download a binary?
2019-05-11T14:01:56.313300
Bethany
pythondev_help_Bethany_2019-05-11T14:01:56.313300
1,557,583,316.3133
23,197
pythondev
help
Usually that'll be an MD5 hash, so you can use the `md5` or `md5sum` command-line tool, depending on your OS.
2019-05-11T14:05:35.314000
Sasha
pythondev_help_Sasha_2019-05-11T14:05:35.314000
1,557,583,535.314
23,198
pythondev
help
so what does it look like? `md5sum checksum -c binary_file`?
2019-05-11T14:08:58.314600
Bethany
pythondev_help_Bethany_2019-05-11T14:08:58.314600
1,557,583,738.3146
23,199
pythondev
help
Normally just `md5sum binary_file`.
2019-05-11T14:10:09.315000
Sasha
pythondev_help_Sasha_2019-05-11T14:10:09.315000
1,557,583,809.315
23,200
pythondev
help
oh and just verify that you get the checksum out?
2019-05-11T14:10:45.315300
Bethany
pythondev_help_Bethany_2019-05-11T14:10:45.315300
1,557,583,845.3153
23,201
pythondev
help
Yeah
2019-05-11T14:11:04.315500
Sasha
pythondev_help_Sasha_2019-05-11T14:11:04.315500
1,557,583,864.3155
23,202
pythondev
help
If you need to script it, it can also read in a checksum file with the hashes and filenames and check everything at once.
2019-05-11T14:12:16.316100
Sasha
pythondev_help_Sasha_2019-05-11T14:12:16.316100
1,557,583,936.3161
23,203
pythondev
help
:taco: <@Sasha>
2019-05-11T14:19:59.316400
Bethany
pythondev_help_Bethany_2019-05-11T14:19:59.316400
1,557,584,399.3164
23,204
pythondev
help
Hi, is it possible to share and synchronise and list of classes between processes using multiprocessing library?
2019-05-11T14:52:52.316800
Pura
pythondev_help_Pura_2019-05-11T14:52:52.316800
1,557,586,372.3168
23,205
pythondev
help
it sounds like you’re trying to deal with global or shared shared state while multiprocessing, which is tricky. maybe this will help: <https://stackoverflow.com/q/16244745> but i look forward to hearing what others have to say about this. there are few answers there that may be interesting for you
2019-05-11T15:46:34.319900
Doug
pythondev_help_Doug_2019-05-11T15:46:34.319900
1,557,589,594.3199
23,206
pythondev
help
what’s the best way to initialize a string that is getting returned inside a Class’s `def __str__(self)`?
2019-05-11T17:03:24.321400
Zelma
pythondev_help_Zelma_2019-05-11T17:03:24.321400
1,557,594,204.3214
23,207
pythondev
help
None
2019-05-11T17:05:59.323100
Zelma
pythondev_help_Zelma_2019-05-11T17:05:59.323100
1,557,594,359.3231
23,208
pythondev
help
what does `transform_in_some_way` do?
2019-05-11T17:10:32.324000
Bethany
pythondev_help_Bethany_2019-05-11T17:10:32.324000
1,557,594,632.324
23,209
pythondev
help
was intending that to be ignored/psuedocode, but maybe it matters?
2019-05-11T17:11:38.324600
Zelma
pythondev_help_Zelma_2019-05-11T17:11:38.324600
1,557,594,698.3246
23,210
pythondev
help
in this case it iterates over a list and += to the string
2019-05-11T17:11:57.325400
Zelma
pythondev_help_Zelma_2019-05-11T17:11:57.325400
1,557,594,717.3254
23,211
pythondev
help
and you want the start value to be empty? you can use `s= ""`
2019-05-11T17:12:23.325900
Bethany
pythondev_help_Bethany_2019-05-11T17:12:23.325900
1,557,594,743.3259
23,212
pythondev
help
okay thanks <@Bethany>!
2019-05-11T17:12:45.326200
Zelma
pythondev_help_Zelma_2019-05-11T17:12:45.326200
1,557,594,765.3262
23,213
pythondev
help
wasn’t sure if that was the best practice, I guess it is the same as `s = str()`
2019-05-11T17:13:16.327100
Zelma
pythondev_help_Zelma_2019-05-11T17:13:16.327100
1,557,594,796.3271
23,214
pythondev
help
I don't think either way is really preferred
2019-05-11T17:28:13.327700
Bethany
pythondev_help_Bethany_2019-05-11T17:28:13.327700
1,557,595,693.3277
23,215
pythondev
help
but `s = None` is different than `s = str()` or `s = ""`
2019-05-11T17:28:45.328300
Bethany
pythondev_help_Bethany_2019-05-11T17:28:45.328300
1,557,595,725.3283
23,216
pythondev
help
hm maybe `str()` for visual clarity
2019-05-11T17:29:07.328800
Bethany
pythondev_help_Bethany_2019-05-11T17:29:07.328800
1,557,595,747.3288
23,217
pythondev
help
I see, the latter would be string types and None nonetype
2019-05-11T17:29:15.329000
Zelma
pythondev_help_Zelma_2019-05-11T17:29:15.329000
1,557,595,755.329
23,218
pythondev
help
yup
2019-05-11T17:29:21.329200
Bethany
pythondev_help_Bethany_2019-05-11T17:29:21.329200
1,557,595,761.3292
23,219
pythondev
help
I’d rather go with `def transform_in_some_way(some_string='')` and would not initialize anything in __str__.
2019-05-11T18:19:57.330100
Brain
pythondev_help_Brain_2019-05-11T18:19:57.330100
1,557,598,797.3301
23,220