Essentially, I'm trying to create MIDI's from scratch and put them online. I'm open to different languages, but prefer to use Python (one of the 2's, if that makes any difference.) and was wondering what library I should use. Thanks in advance!
Looks like this is what you are looking for:
Simple, Cross Platform MIDI Library for Python
MIDIUtil can create MIDI files in python. See:
The original MIDIUtil page on Google Code Archive.
To install, use pip install MIDIUtil