I need to know something about modules

Question

How do I know, what functions and what methods some modules have and what they do?

How can I create modules?

(Python 3)

Answer 1

Here is Python's Standard Library:
https://docs.python.org/3/library/
You can look up individual modules there, e.g. urllib
https://docs.python.org/3/library/urllib.html
Note that you can access the source code there too, e.g.
https://github.com/python/cpython/tree/3.6/Lib/urllib/
See the Python Package Index (PyPI) for more:
https://pypi.org
Here are some codes:
https://code.sololearn.com/c5XZp2CNCWxK/?ref=app
https://code.sololearn.com/c071JeXy6LcW/?ref=app
https://code.sololearn.com/cLF0P3C3eZ52/?ref=app