162 – Check for None functionally

Typically you use the expressions ... is None and ... is not None to check whether an object is or isn’t None, respectively.

The module operator provides the functions is_none and is_not_none that perform the same checks:

from operator import is_none, is_not_none

print(is_none(None))  # True
print(is_not_none(None))  # False

print(is_none(73))  # False
print(is_not_none(73))  # True

These are useful when you’re using higher-order functions.