import os

os.environ["https_proxy"] # error
os.environ["http_proxy"] # error
os.environ["no_proxy"] # error

https://play.ruff.rs/75b318d8-1456-4743-a136-fe45150985ad

while there is no "official" standard, most applications use lowercase for these variables, so i think this rule should ignore them. or maybe a setting could be added for variable names to ignore

source:

• https://unix.stackexchange.com/a/212972
• https://about.gitlab.com/blog/2021/01/27/we-need-to-talk-no-proxy/#http_proxy-and-https_proxy