1127 update to latest

data_representation/permute.py

@@ -0,0 +1,39 @@
+from itertools import groupby, chain
+from random import shuffle, seed
+
+def shuffled(seq):
+    shuffle(seq)
+    return seq
+
+def permute_inside_and_across_tracks(seq):
+    seq_sorted = sorted(seq, key=lambda x: x[5])
+    tracks = [list(g) for _, g in groupby(seq_sorted, key=lambda x: x[5])]  # 5 is program
+    return list(chain.from_iterable(shuffled(t) for t in shuffled(tracks)))
+
+# (PitchDrum, Position, Bar, Velocity, Duration, Program, Tempo, TimeSignature)
+seq = [
+    # Program 0
+    (60, 0, 0, 90,  96, 0, 120, 16),
+    (64, 48,0, 88,  96, 0, 120, 16),
+    (67, 96,0, 92,  96, 0, 120, 16),
+
+    # Program 32
+    (40, 0, 0, 80, 192, 32, 120, 16),
+    (43, 0, 1, 78, 192, 32, 120, 16),
+
+    # Program 40
+    (72, 24,0, 85,  72, 40, 120, 16),
+    (74, 72,0, 83,  72, 40, 120, 16),
+    (76, 24,1, 86,  72, 40, 120, 16),
+]
+
+# seed(42)
+
+inside_track_permuted_and_track_permuted = permute_inside_and_across_tracks(seq)
+
+print("原始 seq：")
+for e in seq:
+    print(e)
+print("\n打乱后的 seq：")
+for e in inside_track_permuted_and_track_permuted:
+    print(e)