pip install flake8 pep8-naming autopep8

# auto fix
find . -name node_modules -prune -o -name '*.py' -exec autopep8 --in-place --aggressive --aggressive {} \;

# these have to be fixed manually
find . -type d -name 'node_modules' -prune -o -name '*.py' -exec flake8 --ignore=E501 {} \;

# make sure to run
grep -r "{global_variable}"
grep -r "{global_function}\("
# to fix your usage in other files in your project