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JRiggles/walrus hunter.py

Last active November 17, 2022 20:05
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RegEx for tracking down Python 'if' and 'while' statements that might be refactorable to use the 'walrus' assignment operator ':='
Raw
walrus hunter.py
regex = r'^\h*(\w+) = .*\n+\h*(if|while) \1:'
# example
from os import environ
# before :=
env = environ.get('PATH', None)
if env:
print(env)
# becomes...
if env := environ.get('PATH', None)
print(env)
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