Simplify Length Comparison

Sourcery refactoring id: simplify-len-comparison

Description:

Removes unnecessarily verbose length comparisons

Before:

if len(list_of_hats) > 0:
    hat_to_wear = choose_hat(list_of_hats)

After:

if list_of_hats:
    hat_to_wear = choose_hat(list_of_hats)

Explanation:

Something we often do is check whether a list or sequence has elements before we try and do something with it.

A Pythonic way of doing this is just to use the fact that Python lists and sequences evaluate to True if they have elements, and False otherwise.

Doing it this way is a convention, set out in Python's PEP8 style guide. Once you've gotten used to doing it this way it does make the code slightly easier to read and a bit less cluttered.