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

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/

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

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=

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

Nice one.

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

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?

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

Thanks for adding. The link I posted should give people a quick animation to directly see what is possible instead of having to read through things first. That GitHub repo link is also on hat page. But you are right that some would probably want to start with the repo, thanks for feedback.

Appreciated!

Thanks, I'm pretty stoked about it myself.