MeasurewiseQSchemaItem

class abjadext.nauert.MeasurewiseQSchemaItem.MeasurewiseQSchemaItem(search_tree=None, tempo=None, time_signature=None, use_full_measure=None)

Measurewise q-schema item.

Represents a change of state in the timeline of a metered quantization process.

>>> q_schema_item = abjadext.nauert.MeasurewiseQSchemaItem()

Defines a change in tempo:

>>> q_schema_item = abjadext.nauert.MeasurewiseQSchemaItem(
...     tempo=((1, 4), 60),
...     )
>>> print(format(q_schema_item))
abjadext.nauert.MeasurewiseQSchemaItem(
    tempo=abjad.MetronomeMark(
        reference_duration=abjad.Duration(1, 4),
        units_per_minute=60,
        ),
    )

Defines a change in time signature:

>>> q_schema_item = abjadext.nauert.MeasurewiseQSchemaItem(
...     time_signature=(6, 8),
...     )
>>> print(format(q_schema_item))
abjadext.nauert.MeasurewiseQSchemaItem(
    time_signature=abjad.TimeSignature((6, 8)),
    )

Tests for beatspan given a defined time signature:

>>> q_schema_item.beatspan
Duration(1, 8)

---

Attributes Summary

beatspan	The beatspan duration, if a time signature was defined.
time_signature	The optionally defined TimeSignature.
use_full_measure	If True, use the full measure as the beatspan.

---

Special methods

(QSchemaItem).__format__(format_specification='')

Formats q schema item.

Set format_specification to ‘’ or ‘storage’. Interprets ‘’ equal to ‘storage’.

Returns string.

(AbjadObject).__repr__()

Gets interpreter representation of Abjad object.

Returns string.

---

Read-only properties

beatspan

The beatspan duration, if a time signature was defined.

Returns duration or none.

(QSchemaItem).search_tree

The optionally defined search tree.

Returns search tree or none.

(QSchemaItem).tempo

The optionally defined tempo.

Returns tempo or none.

time_signature

The optionally defined TimeSignature.

Returns time signature or none

use_full_measure

If True, use the full measure as the beatspan.

Returns boolean or none.