I do this in Python-land. There's a tool called 'pep8' named after the community sanctioned style-guide of the same name. Before I push any changes I have a script that runs my tests and the pep8 script. It's more of a backup-measure in my case since I have my editor run pep8, lint, and my unit tests constantly.
Indeed, and combining it with pyflakes makes for a great combo, ensuring that code you commit both looks generally correct, and passes basic sanity checks.
