VerticalMoment¶

class abjad.core.VerticalMoment.VerticalMoment(components=None, offset=None)¶

Vertical moment.

>>> score = abjad.Score()
>>> staff_group = abjad.StaffGroup()
>>> staff_group.lilypond_type = 'PianoStaff'
>>> staff_group.append(abjad.Staff("c'4 e'4 d'4 f'4"))
>>> staff_group.append(abjad.Staff(r"""\clef "bass" g2 f2"""))
>>> score.append(staff_group)
>>> abjad.show(score) 

>>> for moment in abjad.iterate(score).vertical_moments():
...     moment
... 
VerticalMoment(0, <<2>>)
VerticalMoment(1/4, <<2>>)
VerticalMoment(1/2, <<2>>)
VerticalMoment(3/4, <<2>>)

Attributes Summary

`__eq__`	Is true when `argument` is a vertical moment with the same components as this vertical moment.
`__hash__`	Hases vertical moment.
`__len__`	Length of vertical moment.
`__repr__`	Gets interpreter representation of vertical moment.
`attack_count`	Positive integer number of pitch carriers starting at vertical moment.
`components`	Tuple of zero or more components happening at vertical moment.
`governors`	Tuple of one or more containers in which vertical moment is evaluated.
`leaves`	Tuple of zero or more leaves at vertical moment.
`measures`	Tuple of zero or more measures at vertical moment.
`next_vertical_moment`	Reference to next vertical moment forward in time.
`notes`	Tuple of zero or more notes at vertical moment.
`notes_and_chords`	Tuple of zero or more notes and chords at vertical moment.
`offset`	Rational-valued score offset at which vertical moment is evaluated.
`overlap_components`	Tuple of components in vertical moment starting before vertical moment, ordered by score index.
`overlap_leaves`	Tuple of leaves in vertical moment starting before vertical moment, ordered by score index.
`overlap_measures`	Tuple of measures in vertical moment starting before vertical moment, ordered by score index.
`overlap_notes`	Tuple of notes in vertical moment starting before vertical moment, ordered by score index.
`previous_vertical_moment`	Reference to previous vertical moment backward in time.
`start_components`	Tuple of components in vertical moment starting with at vertical moment, ordered by score index.
`start_leaves`	Tuple of leaves in vertical moment starting with vertical moment, ordered by score index.
`start_notes`	Tuple of notes in vertical moment starting with vertical moment, ordered by score index.

Special methods

__eq__(argument)¶

Is true when argument is a vertical moment with the same components as this vertical moment.

Returns true or false.

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

Formats Abjad object.

Set format_specification to '' or 'storage'. Interprets '' equal to 'storage'.

Returns string.

__hash__()¶

Hases vertical moment.

Redefined in tandem with __eq__.

__len__()¶

Length of vertical moment.

Defined equal to the number of components in vertical moment.

Returns nonnegative integer.

__repr__()¶

Gets interpreter representation of vertical moment.

Returns string.

Read-only properties

attack_count¶: Positive integer number of pitch carriers starting at vertical moment.

components¶

Tuple of zero or more components happening at vertical moment.

It is always the case that self.components = self.overlap_components + self.start_components.

governors¶: Tuple of one or more containers in which vertical moment is evaluated.

leaves¶: Tuple of zero or more leaves at vertical moment.

measures¶: Tuple of zero or more measures at vertical moment.

next_vertical_moment¶: Reference to next vertical moment forward in time.

notes¶: Tuple of zero or more notes at vertical moment.

notes_and_chords¶: Tuple of zero or more notes and chords at vertical moment.

offset¶: Rational-valued score offset at which vertical moment is evaluated.

overlap_components¶: Tuple of components in vertical moment starting before vertical moment, ordered by score index.

overlap_leaves¶: Tuple of leaves in vertical moment starting before vertical moment, ordered by score index.

overlap_measures¶: Tuple of measures in vertical moment starting before vertical moment, ordered by score index.

overlap_notes¶: Tuple of notes in vertical moment starting before vertical moment, ordered by score index.

previous_vertical_moment¶: Reference to previous vertical moment backward in time.

start_components¶: Tuple of components in vertical moment starting with at vertical moment, ordered by score index.

start_leaves¶: Tuple of leaves in vertical moment starting with vertical moment, ordered by score index.

start_notes¶: Tuple of notes in vertical moment starting with vertical moment, ordered by score index.