midiutil-some-notes.py

#!/usr/bin/env python

# https://midiutil.readthedocs.io/en/1.2.1/

from midiutil.MidiFile import MIDIFile

# create your MIDI object
mf = MIDIFile(1)     # only 1 track
track = 0   # the only track

time = 0    # start at the beginning
mf.addTrackName(track, time, "Some notes")
mf.addTempo(track, time, 120)

# add some notes
channel = 0
volume = 100

duration = 1         # 1 beat long

pitch = 60           # C4 (middle C)
time = 0             # start on beat 0
mf.addNote(track, channel, pitch, time, duration, volume)

pitch = 64           # E4
time = 2             # start on beat 2
mf.addNote(track, channel, pitch, time, duration, volume)

pitch = 67           # G4
time = 4             # start on beat 4
mf.addNote(track, channel, pitch, time, duration, volume)

# write it to disk
with open("some-notes.mid", 'wb') as outf:
    mf.writeFile(outf)