RatioPartsExpression¶

class evans.consort.RatioPartsExpression.RatioPartsExpression(parts=0, ratio=(1, 1), mask_timespan=None)[source]¶

Ratio parts expression.

>>> expression = evans.RatioPartsExpression(
...     ratio=(1, 2, 1),
...     parts=(0, 2),
... )
>>> print(repr(expression))
evans.RatioPartsExpression(
    parts=(0, 2),
    ratio=abjad.Ratio((1, 2, 1)),
    )

>>> timespan = abjad.Timespan(
...     start_offset=abjad.Duration(1, 2),
...     stop_offset=abjad.Duration(3, 2),
... )
>>> for x in expression(timespan):
...     x
... 
Timespan(Offset((1, 2)), Offset((3, 4)))
Timespan(Offset((5, 4)), Offset((3, 2)))

>>> expression = evans.RatioPartsExpression(
...     ratio=(1, 2, 1),
...     parts=(0, 2),
...     mask_timespan=abjad.Timespan(
...         start_offset=(1, 4),
...     ),
... )
>>> timespan = abjad.Timespan(0, 4)
>>> for x in expression(timespan):
...     x
... 
Timespan(Offset((1, 4)), Offset((1, 1)))
Timespan(Offset((3, 1)), Offset((4, 1)))

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Attributes Summary

__call__	Call self as a function.
from_sequence	Creates a ratio parts expression from sequence.
mask_timespan
parts
ratio

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Special methods

overridden __call__(timespan)[source]¶

Call self as a function.

(AbjadObject).__eq__(argument)¶

Is true when ID of argument equals ID of Abjad object. Otherwise false. Returns true or false.

(AbjadObject).__format__(format_specification='')¶

Formats Abjad object. Set format_specification to ‘’ or ‘storage’. Interprets ‘’ equal to ‘storage’. Returns string.

(AbjadObject).__hash__()¶

Hashes Abjad object. Required to be explicitly redefined on Python 3 if __eq__ changes. Returns integer.

(AbjadObject).__ne__(argument)¶

Is true when Abjad object does not equal argument. Otherwise false. Returns true or false.

(AbjadObject).__repr__()¶

Gets interpreter representation of Abjad object. Returns string.

(AbjadObject).__str__()¶

Return str(self).

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Class & static methods

static from_sequence(sequence)[source]¶

Creates a ratio parts expression from sequence.

>>> ratio = [-1, 2, -1, 1, -1]
>>> expression = evans.RatioPartsExpression.from_sequence(ratio)
>>> print(abjad.storage(expression))
evans.RatioPartsExpression(
    parts=(1, 3),
    ratio=abjad.Ratio((1, 2, 1, 1, 1)),
    )

Returns new ratio parts expression.

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Read-only properties

mask_timespan¶

parts¶

ratio¶