In Python, booleans are a subclass of integers. When you apply the bitwise NOT operator ( ~ ) to a boolean: ~True (which is ~1 ) evaluates to -2 . ~False (which is ~0 ) evaluates to -1 .
Keep an eye on your console for those DeprecationWarnings —they are there to help you stay ahead of the curve! 122982
For most developers, this is rarely the intended result. Usually, someone using ~ on a boolean actually wants the logical NOT ( not True ), which correctly returns False . Because of this common point of confusion, the Python steering committee decided to deprecate bitwise inversion on booleans to encourage clearer coding practices. What’s New in Issue #122982? In Python, booleans are a subclass of integers
It allows more time for the community to discuss if there are specific edge cases where bitwise inversion on bool remains necessary. How to Prepare Your Code Keep an eye on your console for those
Python Development Update: Extending the Deprecation Warning for ~bool (Issue #122982)
Large codebases and libraries need time to refactor code that might be legacy or automatically generated.
Originally, the plan was to move toward a full error or a more aggressive deprecation schedule. However, Issue #122982 proposes . This extension serves a few key purposes: