I will proceed with the discussion based on Python. maybe. For the time being, I will summarize the terms and finally the inclusive relations.
The class has * attributes *. Attributes are * data attributes * and * methods *.
A * function * in a class. It's a child who does various processing.
A * Python file * with the extension .py.
Various definitions (variables and functions) are written in this file.
There is also an executable statement (for initializing the module).
A collection of multiple modules.
A way to structure module namespaces using "dotted module names" https://docs.python.org/ja/3/tutorial/modules.html#packages
In other words, thanks to this package, you can refer to various modules, and even if there is a function with the same name, you can use it well. Thank you and thank you.
By the way, pip is a package management tool.
A collection of multiple packages.
It's like * library ⊇ package ⊇ module *.
Isn't it similar to a class that you can refer to a module with a dot operator like an object reference? Also, there are too many names.
Python official documentation (Japanese) I think it's different, but I used it as a reference Modules and packages in Python are "namespaces"