A fix I found for a few beginner problems I had with this!
1. Couldn't get it to run on Windows - Python kept complaining about invalid arguments. Got it to run on Linux by turning "/*.html" into "./*.html".
2. It outputs a stream of info. If you don't specify where to put it, it'll just put it in the command line. On Linux and Windows, you can pipe it to a file by adding "> output.enex" after.