Avoid shadowing builtins

This will hopefully avoid nasty surprises in the future. It's easy to
check since there is already a ruff linter [1] for it which this commit
also enables. Make sure not to complain about exit() [2] since that is
only for interactive use and shouldn't be called in programs anyway.

[1] https://docs.astral.sh/ruff/rules/builtin-attribute-shadowing/
[2] https://docs.python.org/3.12/library/constants.html#exit

1 files changed, 4 insertions, 0 deletions

diff --git a/ruff.toml b/ruff.toml
index 2a53694..d00d37e 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -8,7 +8,11 @@ select = [
 	"W",   # pycodestyle
 	"I",   # isort
 	"UP",  # pyupgrade
+	"A",   # flake8-builtins
 	"B",   # flake8-bugbear
 	"SIM", # flake8-simplify
 	"FURB" # refurb
 ]
+
+[lint.flake8-builtins]
+builtins-ignorelist = ["exit"]