Prints a list of messages from a MIDI file using the `mido` library

example_outout.txt

=== Track 0
<message note_on channel=0 note=69 velocity=100 time=0>
<message note_off channel=0 note=69 velocity=0 time=522>
<message note_on channel=0 note=71 velocity=100 time=27>
<message note_off channel=0 note=71 velocity=0 time=27>
<message note_on channel=0 note=69 velocity=100 time=27>
<message note_off channel=0 note=69 velocity=0 time=27>
<message note_on channel=0 note=71 velocity=100 time=27>
<message note_off channel=0 note=71 velocity=0 time=137>
<message note_on channel=0 note=72 velocity=100 time=27>
<message note_off channel=0 note=72 velocity=0 time=27>
<message note_on channel=0 note=74 velocity=100 time=27>
<message note_off channel=0 note=74 velocity=0 time=82>
<message note_on channel=0 note=71 velocity=100 time=27>
<message note_off channel=0 note=71 velocity=0 time=82>
<message note_on channel=0 note=72 velocity=100 time=27>
<message note_off channel=0 note=72 velocity=0 time=192>
<meta message end_of_track time=1>
=== Track 1
<message note_on channel=0 note=46 velocity=100 time=0>
<message note_off channel=0 note=46 velocity=0 time=27>
<message note_on channel=0 note=66 velocity=100 time=0>
<message note_off channel=0 note=66 velocity=0 time=55>
<message note_on channel=0 note=55 velocity=100 time=27>
<message note_off channel=0 note=55 velocity=0 time=82>
<message note_on channel=0 note=57 velocity=100 time=27>
<message note_off channel=0 note=57 velocity=0 time=412>
<message note_on channel=0 note=56 velocity=100 time=137>
<message note_off channel=0 note=56 velocity=0 time=27>
<message note_on channel=0 note=60 velocity=100 time=27>
<message note_off channel=0 note=60 velocity=0 time=27>
<message note_on channel=0 note=59 velocity=100 time=27>
<message note_off channel=0 note=59 velocity=0 time=27>
<message note_on channel=0 note=62 velocity=100 time=27>
<message note_off channel=0 note=62 velocity=0 time=27>
<message note_on channel=0 note=52 velocity=100 time=27>
<message note_off channel=0 note=52 velocity=0 time=27>
<message note_on channel=0 note=53 velocity=100 time=27>
<message note_off channel=0 note=53 velocity=0 time=27>
<message note_on channel=0 note=52 velocity=100 time=27>
<message note_off channel=0 note=52 velocity=0 time=82>
<message note_on channel=0 note=52 velocity=100 time=27>
<message note_off channel=0 note=52 velocity=0 time=82>
<message note_on channel=0 note=40 velocity=100 time=27>
<message note_off channel=0 note=40 velocity=0 time=192>
<message note_on channel=0 note=45 velocity=100 time=82>
<message note_off channel=0 note=45 velocity=0 time=27>
<message note_on channel=0 note=47 velocity=100 time=27>
<message note_off channel=0 note=47 velocity=0 time=27>
<message note_on channel=0 note=48 velocity=100 time=27>
<message note_off channel=0 note=48 velocity=0 time=27>
<meta message end_of_track time=1>
=== Track 2
<message note_on channel=0 note=40 velocity=100 time=0>
<message note_off channel=0 note=40 velocity=0 time=27>
<message note_on channel=0 note=76 velocity=100 time=0>
<message note_off channel=0 note=76 velocity=0 time=55>
<message note_on channel=0 note=73 velocity=100 time=27>
<message note_off channel=0 note=73 velocity=0 time=82>
<message note_on channel=0 note=74 velocity=100 time=27>
<message note_off channel=0 note=74 velocity=0 time=82>
<message note_on channel=0 note=74 velocity=100 time=27>
<message note_off channel=0 note=74 velocity=0 time=27>
<message note_on channel=0 note=73 velocity=100 time=27>
<message note_off channel=0 note=73 velocity=0 time=27>
<message note_on channel=0 note=74 velocity=100 time=27>
<message note_off channel=0 note=74 velocity=0 time=27>
<message note_on channel=0 note=69 velocity=100 time=467>
<message note_off channel=0 note=69 velocity=0 time=55>
<message note_on channel=0 note=72 velocity=100 time=0>
<message note_off channel=0 note=72 velocity=0 time=192>
<message note_on channel=0 note=72 velocity=100 time=27>
<message note_off channel=0 note=72 velocity=0 time=27>
<message note_on channel=0 note=72 velocity=100 time=27>
<message note_off channel=0 note=72 velocity=0 time=27>
<message note_on channel=0 note=71 velocity=100 time=27>
<message note_off channel=0 note=71 velocity=0 time=27>
<message note_on channel=0 note=72 velocity=100 time=27>
<message note_off channel=0 note=72 velocity=0 time=27>
<message note_on channel=0 note=70 velocity=100 time=27>
<message note_off channel=0 note=70 velocity=0 time=27>
<meta message end_of_track time=1>
=== Track 3
<message note_on channel=0 note=61 velocity=100 time=0>
<message note_off channel=0 note=61 velocity=0 time=55>
<message note_on channel=0 note=54 velocity=100 time=0>
<message note_off channel=0 note=54 velocity=0 time=220>
<message note_on channel=0 note=55 velocity=100 time=0>
<message note_off channel=0 note=55 velocity=0 time=165>
<message note_on channel=0 note=54 velocity=100 time=27>
<message note_off channel=0 note=54 velocity=0 time=220>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=137>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=55>
<message note_on channel=0 note=57 velocity=100 time=0>
<message note_off channel=0 note=57 velocity=0 time=137>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=55>
<message note_on channel=0 note=57 velocity=100 time=0>
<message note_off channel=0 note=57 velocity=0 time=27>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=27>
<message note_on channel=0 note=54 velocity=100 time=27>
<message note_off channel=0 note=54 velocity=0 time=27>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=82>
<message note_on channel=0 note=54 velocity=100 time=27>
<message note_off channel=0 note=54 velocity=0 time=27>
<message note_on channel=0 note=56 velocity=100 time=27>
<message note_off channel=0 note=56 velocity=0 time=27>
<message note_on channel=0 note=57 velocity=100 time=27>
<meta message end_of_track time=1>

print_midi.py

"""
Prints a list of messages from a MIDI file.

Requirements: mido, Python 2/3
Usage: python print_midi.py foo.mid
"""

import argparse
import mido


def print_midi(midi_file):
    mid = mido.MidiFile(midi_file)
    mid.print_tracks()


def parse_args():
    parser = argparse.ArgumentParser(description='Print messages in a MIDI file.')
    parser.add_argument('midi_file')

    return parser.parse_args()


if __name__ == '__main__':
    args = parse_args()
    print_midi(args.midi_file)