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bterwijn

@ bterwijn @programming.dev

Posts
13
Comments
24
Joined
8 mo. ago

  • Python's Data Model Explained through Visualization

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  • It's definitely not the same. Similarly for a class you can define the __add__ dunder method for a + b and separately the __iadd__ dunder method for a += b. The first creates a new object, the latter changes/mutates the existing object a. For immutable types it is the same though.

  • Python Data Model: Copying

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  • Nice one, see the "Solution" link for correct answer.

  • Data Structures Made Clear

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  • Yes I understand your point, but I'm trying to reach out so people are aware and can use it in Python education. I feel it can really help beginners understand tricky concepts with ease, bit it's hard to reach a bigger audience these days. Sorry for the repetition, I'll guess I should cut back a bit.

  • Python @programming.dev
    bterwijn @programming.dev

    Data Structures Made Clear

  • Python Data Model: Copying

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  • Different languages make different choices. The disadvantage of Haskell is that if you want to change one value in a collection of a million values that it either makes a full copy or tries to optimize by sharing values behind the scene, both resulting in significant overhead. Most people already understand that pure functional programming languages don't deliver except in very specific circumstances: Haskell TIOBE rating 0.32%, https://www.tiobe.com/tiobe-index/

  • Python Data Model: Copying

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  • Incorrect sorry, check the "Solution" link for the correct answer.

  • Python @programming.dev
    bterwijn @programming.dev

    Python Data Model: Copying

  • Python @programming.dev
    bterwijn @programming.dev

    Multiway Tree visualized using memory_graph

  • Python @programming.dev
    bterwijn @programming.dev

    Python Copies

  • Python Mutability

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  • Thanks. I didn't know: https://memory-graph.com/#code=x+%3D+%280%2C+%5B1%2C+2%5D%29%0Atry%3A%0A++++x%5B1%5D+%2B%3D+%5B3%5D++%23+calls+list.__iadd__%2C+then+reassigns+x%5B1%5D%0Aexcept+TypeError+as+e%3A%0A++++print%28e%29%0A%0Ax+%2B%3D+%284%2C%29++%23+calls+tuple.__add__%2C+then+reassigns+x%0A%0Aprint%28x%29%0A%0A%0Aclass+MyClass%3A%0A++++%0A++++def+__add__%28self%2C+other%29%3A%0A++++++++print%28%27__add__%27%29%0A++++++++%0A++++%23def+__iadd__%28self%2C+other%29%3A%0A++++%23++++print%28%27__iadd__%27%29%0A%0Aa+%3D+MyClass%28%29%0Ab+%3D+MyClass%28%29%0Aa+%2B%3D+b++%23+calls+__add__+if+__iadd_+doesn%27t+exist%0A&play=

  • Python Mutability

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  • Python Mutability

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  • Yes a you get for free to set the tone, the others are more interesting.

  • Python @programming.dev
    bterwijn @programming.dev

    Python Mutability

  • Python @programming.dev
    bterwijn @programming.dev

    Python bitwise operators

  • Right Mental Model for Python Data

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  • Nice one.

  • Right Mental Model for Python Data

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  • The whole point is to practice Python Data Model concepts, it's not a best-way-to-code example, so feel free to hate.

  • Right Mental Model for Python Data

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  • You are right, in landscape mode it's better, but still not ideal. It's a project I don't have time for now. On the other hand, did you run Python code, in an IDE where the debugger visualizes the whole program state, on your Phone before?

  • Right Mental Model for Python Data

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  • C is incorrect,sorry. See the "Solution" link for the correct answer.

  • Python @programming.dev
    bterwijn @programming.dev

    Right Mental Model for Python Data

  • Python @programming.dev
    bterwijn @programming.dev

    Invocation Tree Web Debugger

  • Python @programming.dev
    bterwijn @programming.dev

    Understand the Python Data Model and Data Structures

  • Python Mutability

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  • Actually running the code? I got to the stage where only AI can help me understand anything ;-)

  • Python Mutability

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  • Thanks for your feedback, much appriciated.

    I agree that an exercise14.rst would be nice, but to save time I've let the code speak for itself now together with the visualizaion. I'll probably revisit and better document the exercises later.

    At the Explanation link I try to give a general explanation about Pyrhon mutability (and copy later on), I agree some readers might find it hard to relate that to a specific exercise, but I don't want to write a specific explanation for each exercise.

  • Python Mutability

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  • Thanks for reporting, should be fixed now.

  • Python Mutability

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  • Python Mutability

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  • The "Solution" link gives the solution to the exercise, the "Explanation" link explains the Python data model concepts behind the exercise. If some parts are hard to understand let me know.

  • Python Mutability

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  • Yes, that is a surprise to many, in other languages 'x+=y' and 'x=x+y' are the same.

  • Python Mutability

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  • Thanks, glad it helps you.

  • Python @programming.dev
    bterwijn @programming.dev

    Python Mutability

  • Python @programming.dev
    bterwijn @programming.dev

    Memory Graph Web Debugger