Not very well explained PEP 20 and PEP 257 !?

Answer 1

PEP 20 "The Zen of Python" is basically some ideals on how you should make your code easy to read and understand in an unambiguous pythonic way, making sure to handle errors so that the end user ins't left wondering what happened when something goes wrong.
https://www.python.org/dev/peps/pep-0020/
PEP 257 "Docstring Conventions" is a simple "how to" or "the basics" for docstrings. Other PEP's will explain further about designs, formatting etc.
https://www.python.org/dev/peps/pep-0257/