40 lines
1.0 KiB
Python
40 lines
1.0 KiB
Python
from itertools import groupby, chain
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from random import shuffle, seed
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def shuffled(seq):
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shuffle(seq)
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return seq
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def permute_inside_and_across_tracks(seq):
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seq_sorted = sorted(seq, key=lambda x: x[5])
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tracks = [list(g) for _, g in groupby(seq_sorted, key=lambda x: x[5])] # 5 is program
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return list(chain.from_iterable(shuffled(t) for t in shuffled(tracks)))
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# (PitchDrum, Position, Bar, Velocity, Duration, Program, Tempo, TimeSignature)
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seq = [
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# Program 0
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(60, 0, 0, 90, 96, 0, 120, 16),
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(64, 48,0, 88, 96, 0, 120, 16),
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(67, 96,0, 92, 96, 0, 120, 16),
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# Program 32
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(40, 0, 0, 80, 192, 32, 120, 16),
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(43, 0, 1, 78, 192, 32, 120, 16),
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# Program 40
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(72, 24,0, 85, 72, 40, 120, 16),
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(74, 72,0, 83, 72, 40, 120, 16),
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(76, 24,1, 86, 72, 40, 120, 16),
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]
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# seed(42)
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inside_track_permuted_and_track_permuted = permute_inside_and_across_tracks(seq)
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print("原始 seq：")
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for e in seq:
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print(e)
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print("\n打乱后的 seq：")
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for e in inside_track_permuted_and_track_permuted:
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print(e)
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