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Python Performance: Why 'if not list' is 2x Faster Than Using len() (blog.codingconfessions.com)

submitted 3 months ago by [email protected] to c/[email protected]

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[-] [email protected] 1 points 3 months ago* (last edited 3 months ago)

Then I absolutely understand you :)

How common it is 100 % depends on the code base and what practices are preferred. In Python code bases where I have a word in decisions, all Boolean checks should be x is True or x is False if x should be a Boolean. In that sense, if I read if x or if not x, it's an indicator that x does not need to be a Boolean.

In that sense, I could say that my preference is to flip it (in Python): Explicitly indicate/check for a Boolean if you expect/need a Boolean, otherwise use a "truethiness" check.

this post was submitted on 12 Apr 2025

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