Tv Renamr is a command line utility to rename TV show files into a cleaner format written in Python by George Hickman.
The source can be found on Github along with the issue tracker.
Quickstart docs are in the readme on Github while more in-depth versions are on Read the Docs.
Install via pip or easy install from the PyPI.
Run on the command line with tvr and a filename, directory, or wildcard (*.avi).