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Merge pull request #2 from marimo-team/haleshot/collections
Browse files- Python/phase_1/collections.py +254 -0
Python/phase_1/collections.py
ADDED
@@ -0,0 +1,254 @@
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1 |
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# /// script
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# requires-python = ">=3.10"
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# dependencies = [
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# "marimo",
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# ]
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# ///
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import marimo
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__generated_with = "0.10.14"
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app = marimo.App()
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@app.cell
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def _():
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import marimo as mo
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return (mo,)
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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# 📦 Collections in Python
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Explore Python's built-in collection types — the essential data structures!
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## Lists
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Lists are ordered, mutable sequences. Create them using square brackets:
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```python
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fruits = ["apple", "banana", "orange"]
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numbers = [1, 2, 3, 4, 5]
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mixed = [1, "hello", 3.14, True] # Can contain different types
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```
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Below is an example list we'll use to explore operations.
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"""
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)
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return
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@app.cell
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def _():
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sample_list = [1, 2, 3, 4, 5]
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return (sample_list,)
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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## List Operations
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Here are common operations you can perform on lists.
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Try changing the values in `sample_list` above and watch the results change.
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"""
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)
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return
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@app.cell
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def _(sample_list):
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len(sample_list) # List length
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return
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@app.cell
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def _(sample_list):
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extended_list = sample_list + [6] # concatenate two lists
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extended_list
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return (extended_list,)
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@app.cell
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def _(extended_list):
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extended_list[0] # Access first element
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return
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@app.cell
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def _(extended_list):
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extended_list[-1] # Access last element
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return
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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## Tuples
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Tuples are immutable sequences. They're like lists that can't be changed after creation:
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"""
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)
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return
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@app.cell
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def _():
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coordinates = (10, 20)
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return (coordinates,)
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@app.cell
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def _(coordinates):
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x, y = coordinates # Tuple unpacking
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x
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return x, y
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@app.cell(hide_code=True)
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def _(mo):
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mo.md("""#### Tuple concatenation""")
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return
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@app.cell
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def _():
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tuple1 = (1, 2, 3)
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tuple2 = (4, 5, 6)
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tuple3 = tuple1 + tuple2
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tuple3
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return tuple1, tuple2, tuple3
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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## Dictionaries
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Dictionaries store key-value pairs. They're perfect for mapping relationships:
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"""
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)
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return
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@app.cell
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def _():
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person = {
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"name": "John Doe",
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"age": 25,
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"city": "New York"
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}
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return (person,)
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@app.cell
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def _(person):
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person["name"] # Access value by key
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return
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@app.cell
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def _(person):
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person.keys() # Get all keys
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return
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@app.cell
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def _(person):
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person.values() # Get all values
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return
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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## Sets
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Sets are unordered collections of unique elements:
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"""
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)
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return
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@app.cell
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def _():
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numbers_set = {1, 2, 3, 3, 2, 1} # Duplicates are removed
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return (numbers_set,)
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@app.cell
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def _(numbers_set):
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numbers_set.add(4) # Add new element
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numbers_set
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return
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@app.cell
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def _():
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set1 = {1, 2, 3}
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set2 = {3, 4, 5}
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set1.intersection(set2) # Find common elements
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return set1, set2
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@app.cell(hide_code=True)
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def _(mo):
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mo.md(
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"""
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## Collection Methods and Operations
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Here are some common operations across collections:
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```python
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# Lists
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my_list = [1, 2, 3]
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my_list.insert(0, 0) # Insert at position
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my_list.remove(2) # Remove first occurrence
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my_list.sort() # Sort in place
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sorted_list = sorted(my_list) # Return new sorted list
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# Dictionaries
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my_dict = {"a": 1}
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my_dict.update({"b": 2}) # Add new key-value pairs
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my_dict.get("c", "Not found") # Safe access with default
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# Sets
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set_a = {1, 2, 3}
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set_b = {3, 4, 5}
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set_a.union(set_b) # Combine sets
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set_a.difference(set_b) # Elements in A but not in B
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```
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"""
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)
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return
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@app.cell(hide_code=True)
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def _(mo):
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callout_text = mo.md("""
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## Collection Mastery Awaits!
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239 |
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240 |
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Next Steps:
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241 |
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242 |
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- Practice list and dictionary comprehensions
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243 |
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- Experiment with nested collections
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244 |
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- Try combining different collection types
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245 |
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246 |
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Keep organizing data! 🗃️✨
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""")
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mo.callout(callout_text, kind="success")
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return (callout_text,)
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if __name__ == "__main__":
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app.run()
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