Docstrings

We've mentioned docstrings before, but now we will cover them in greater detail. Docstrings are triple-quoted strings that have special significance within Python. When used, they form the __doc__ attribute of an object. There are many examples of projects that don't use docstrings, but it is highly advised to incorporate docstrings into your projects. If you do use them, review PEP 257 -- Docstring Conventions (https://www.python.org/dev/peps/pep-0257/) to see how to do them right; a Python Enhancement Proposal (PEP) is used to discuss changes to the Python language. Not following the guidelines is fine, as long as you're consistent within your code. However, if you try to use tools such as Docutils, you can have problems, as they expect the docstrings to be properly formatted; Docutils is a text processing system that converts plain text into formatted...