Tutorial 4.8 call by value vs reference is confusing

Documentation

The part about how arguments are passed in Section 4.8 (by value vs by reference) is written in a confusing way and there is even a footnote admitting to it

IMO an improvement would be along the lines:
Arguments are always passed using call by value. For objects that are passed this value consists of a reference to that object. Which means that mutations to the object are visible outside, reassignments of another reference to the variable inside the function are not. insert example

Linked PRs

• gh-148563

阅读 docs.python.org/3/tutorial/controlflow.html#defining-functions 中 Python 教程的第 4.8 节，包括其脚注，并审阅链接的 PR gh-148563。完成的标准是，对值传递与引用传递的解释更加清晰，并包含一个展示变更与重新赋值区别的示例。