def from_midi_file(cls, filename: str) -> "ChordProgression":
notes = read_midi_file(filename)
progression = []
for chord in group_notes_to_chords(notes):
progression.append(Chord.from_midi([note.note for note in chord]))
return cls(progression)
def test_chord_from_midi(midi, name):
assert Chord.from_midi(midi).name == name