PEP 8 — guidelines for Python code

The very first rule PEP 8 introduces is that rules/guidelines in PEP 8 should only apply when they make our code easier to read. This means we should apply PEP 8 to enhance the readability of the code and to make it less complex. For example, if we're working on a project that was already written with a different coding style (that is, it is already easy to read), we should use that project style for new code. If the PEP 8 rules somehow make the code harder to read or make it complex while writing the code, we should ignore those rules. As Guido Van Rossum, the creator of Python, has noted:

For more information on PEP 8 rules and guidelines, you can refer to the following link:
https://www.python.org/dev/peps/pep-0008/. 

To know when to ignore a particular guideline, you can follow the A Foolish Consistency is the Hobgoblin of Little Minds article at the following link:
https://www.python.org/dev/peps/pep-0008/#a-foolish-consistency-is-the-hobgoblin-of-little-minds.