def partition_by_ratio_of_lengths(self, ratio):
r'''Partitions sequence by `ratio` of lengths.
.. container:: example
**Example 1.** Partitions sequence by ``1:1:1`` ratio:
::
>>> numbers = Sequence(range(10))
>>> ratio = mathtools.Ratio((1, 1, 1))
>>> numbers.partition_by_ratio_of_lengths(ratio)
Sequence((Sequence((0, 1, 2)), Sequence((3, 4, 5, 6)), Sequence((7, 8, 9))))
.. container:: example
**Example 2.** Partitions sequence by ``1:1:2`` ratio:
::
>>> numbers = Sequence(range(10))
>>> ratio = mathtools.Ratio((1, 1, 2))
>>> numbers.partition_by_ratio_of_lengths(ratio)
Sequence((Sequence((0, 1, 2)), Sequence((3, 4)), Sequence((5, 6, 7, 8, 9))))
Returns a sequence of sequences.
'''
from abjad.tools import sequencetools
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.items,
ratio=ratio,
)
parts = [type(self)(_) for _ in parts]
return type(self)(parts)
def partition_by_ratio(self, ratio):
r'''Partition payload expression by ratio.
::
>>> result = payload_expression.partition_by_ratio((1, 1))
::
>>> for element in result:
... print(format(element))
musicexpressiontools.IterablePayloadExpression(
payload=(
(4, 16),
),
)
musicexpressiontools.IterablePayloadExpression(
payload=(
(2, 16),
),
)
Returns list of newly constructed payload expressions.
'''
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.payload, ratio)
result = []
for part in parts:
part = new(self, payload=part)
result.append(part)
return result
def partition_by_ratio_of_lengths(self, ratio):
r'''Partitions sequence by `ratio` of lengths.
.. container:: example
**Example 1.** Partitions sequence by ``1:1:1`` ratio:
::
>>> numbers = Sequence(range(10))
>>> ratio = mathtools.Ratio((1, 1, 1))
>>> numbers.partition_by_ratio_of_lengths(ratio)
Sequence((Sequence((0, 1, 2)), Sequence((3, 4, 5, 6)), Sequence((7, 8, 9))))
.. container:: example
**Example 2.** Partitions sequence by ``1:1:2`` ratio:
::
>>> numbers = Sequence(range(10))
>>> ratio = mathtools.Ratio((1, 1, 2))
>>> numbers.partition_by_ratio_of_lengths(ratio)
Sequence((Sequence((0, 1, 2)), Sequence((3, 4)), Sequence((5, 6, 7, 8, 9))))
Returns a sequence of sequences.
'''
from abjad.tools import sequencetools
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.items,
ratio=ratio,
)
parts = [type(self)(_) for _ in parts]
return type(self)(parts)
def partition_by_ratio(self, ratio):
r'''Partition payload expression by ratio.
::
>>> result = payload_expression.partition_by_ratio((1, 1))
::
>>> for element in result:
... print(format(element))
musicexpressiontools.IterablePayloadExpression(
payload=(
(4, 16),
),
)
musicexpressiontools.IterablePayloadExpression(
payload=(
(2, 16),
),
)
Returns list of newly constructed payload expressions.
'''
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.payload, ratio)
result = []
for part in parts:
part = new(self, payload=part)
result.append(part)
return result
def partition_by_ratio(self, ratio):
r'''Partition start-positioned payload expression by ratio.
Operates in place and returns newly constructed inventory.
'''
from experimental.tools import musicexpressiontools
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.elements, ratio)
durations = [self._get_duration_of_list(part) for part in parts]
payload_parts = self._split_payload_at_offsets(durations)
start_offsets = mathtools.cumulative_sums(durations)[:-1]
start_offsets = [
self.start_offset + start_offset
for start_offset in start_offsets]
payload_expressions = \
musicexpressiontools.TimespanScopedSingleContextSetExpressionInventory()
for payload_part, start_offset in zip(payload_parts, start_offsets):
timespan = timespantools.Timespan(start_offset)
payload_expression = type(self)(
[],
start_offset=timespan.start_offset,
voice_name=self.voice_name,
)
payload_expression._payload = payload_part
payload_expressions.append(payload_expression)
return payload_expressions
def partition_by_ratio(self, ratio):
r'''Partition start-positioned payload expression by ratio.
Operates in place and returns newly constructed inventory.
'''
from experimental.tools import musicexpressiontools
parts = sequencetools.partition_sequence_by_ratio_of_lengths(
self.elements, ratio)
durations = [self._get_duration_of_list(part) for part in parts]
payload_parts = self._split_payload_at_offsets(durations)
start_offsets = mathtools.cumulative_sums(durations)[:-1]
start_offsets = [
self.start_offset + start_offset for start_offset in start_offsets
]
payload_expressions = \
musicexpressiontools.TimespanScopedSingleContextSetExpressionInventory()
for payload_part, start_offset in zip(payload_parts, start_offsets):
timespan = timespantools.Timespan(start_offset)
payload_expression = type(self)(
[],
start_offset=timespan.start_offset,
voice_name=self.voice_name,
)
payload_expression._payload = payload_part
payload_expressions.append(payload_expression)
return payload_expressions
def get_indices(cls, pessimistic=False):
indices = []
if not pessimistic:
maximum_id = cls.select(
peewee.fn.Max(cls.id)).scalar()
step = maximum_id // multiprocessing.cpu_count()
for start in range(0, maximum_id, step):
stop = start + step
indices.append(range(start, stop))
else:
query = cls.select(cls.id)
query = query.order_by(cls.id)
query = query.tuples()
all_ids = tuple(_[0] for _ in query)
ratio = [1] * (multiprocessing.cpu_count() * 2)
for chunk in sequencetools.partition_sequence_by_ratio_of_lengths(
all_ids, ratio):
indices.append(chunk)
return indices
def test_sequencetools_partition_sequence_by_ratio_of_lengths_01():
parts = sequencetools.partition_sequence_by_ratio_of_lengths(range(10), [1, 1, 2])
assert parts == [[0, 1, 2], [3, 4], [5, 6, 7, 8, 9]]
