Difference between “if x” and “if x is not None”

Question

It appears that \"if x\" is almost like short-hand for the longer \"if x is not None\" syntax. Are they functionally identical or are there cases where for a given value of

Answer 1

The former tests trueness, whereas the latter tests for identity with None. Lots of values are false, such as False, 0, '', and None, but only None is None.