Simple utility to join split files. Run with Python 3 in a directory containing files with names such as example.avi.001, example.avi.002, etc. or specify paths containing split files as commandline arguments. If everything goes well, those files will be joined into the original example.avi and the split pieces deleted. Run with no arguments to see additional options.
NOTE: This software was written quickly for personal use and currently lacks comprehensive error checking, unit tests, and other niceities which software written for public distribution should include. Please review the code before running. By default it WILL delete the source split parts so data loss is a real possibility. You have been warned.