New in version 2.0.
Yield all subsequences of sequence in lex order:
abjad> from abjad.tools import sequencetools
abjad> list(sequencetools.yield_all_subsequences_of_sequence([0, 1, 2]))
[[], [0], [0, 1], [0, 1, 2], [1], [1, 2], [2]]
Yield all subsequences of sequence greater than or equal to min_length in lex order:
abjad> list(sequencetools.yield_all_subsequences_of_sequence([0, 1, 2, 3, 4], min_length = 3))
[[0, 1, 2], [0, 1, 2, 3], [0, 1, 2, 3, 4], [1, 2, 3], [1, 2, 3, 4], [2, 3, 4]]
Yield all subsequences of sequence less than or equal to max_length in lex order:
abjad> list(sequencetools.yield_all_subsequences_of_sequence([0, 1, 2, 3, 4], max_length = 3))
[[], [0], [0, 1], [0, 1, 2], [1], [1, 2], [1, 2, 3], [2], [2, 3], [2, 3, 4], [3], [3, 4], [4]]
Yield all subsequences of sequence greater than or equal to min_length and less than or equal to max_length in lex order:
abjad> list(sequencetools.yield_all_subsequences_of_sequence([0, 1, 2, 3, 4], min_length = 3, max_length = 3))
[[0, 1, 2], [1, 2, 3], [2, 3, 4]]
Return generator of newly created sequence slices.