Back

Explore Courses Blog Tutorials Interview Questions
0 votes
2 views
in Python by (106k points)

I've always thought of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None. Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?*

*I'm referring to any singleton, rather than just None.

1 Answer

0 votes
by (47.6k points)

You should use if x is not None for readability sake because the bytecode compiler parses both if x is not None and if not x is None into x is not None.

if x is not None: 

X =5 #x can be anything depending on your need

Related questions

0 votes
1 answer
0 votes
4 answers
0 votes
1 answer
asked Jul 31, 2019 in Data Science by sourav (17.6k points)
0 votes
2 answers
asked Oct 3, 2019 in Python by Tech4ever (20.3k points)
Welcome to Intellipaat Community. Get your technical queries answered by top developers!

30.5k questions

32.6k answers

500 comments

108k users

Browse Categories

...