Best Practice For Python: Assert Command() == False

I wonder what is better/best: >>> def command(): ... return False ... >>> assert command() == False >>> assert command() is False >>> assert

Solution 1:

Coding conventions can be studied here: PEP 8 Style Guide for Python Code

There you will find:

Don't compare boolean values to True or False using ==

Yes:   if greeting:
No:    if greeting == True:
Worse: if greeting is True:

Solution 2:

The most pythonic is the third. It is equivalent to:

assert bool(command()) != False