def __getitem__(self, argument):
r'''Gets item in scale.
Returns pitch-class segment.
'''
segment = PitchClassSegment(self)
return segment.__getitem__(argument)
def __init__(self, items=(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)):
from abjad.tools import pitchtools
assert items is not None
PitchClassSegment.__init__(
self,
items=items,
item_class=pitchtools.NumberedPitchClass,
)
self._validate_pitch_classes(self)
def __init__(self, tokens=None, name=None):
from abjad.tools import pitchtools
assert tokens is not None
PitchClassSegment.__init__(
self,
tokens=tokens,
item_class=pitchtools.NumberedPitchClass,
name=name,
)
self._validate_pitch_classes(self)
def __init__(
self,
items=(0, 1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8),
):
from abjad.tools import pitchtools
assert items is not None
PitchClassSegment.__init__(
self,
items=items,
item_class=pitchtools.NumberedPitchClass,
)
self._validate_pitch_classes(self)
def __init__(
self,
tokens=(0, 1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8),
custom_identifier=None,
):
from abjad.tools import pitchtools
assert tokens is not None
PitchClassSegment.__init__(
self,
tokens=tokens,
item_class=pitchtools.NumberedPitchClass,
custom_identifier=custom_identifier,
)
self._validate_pitch_classes(self)
def __getslice__(self, start, stop):
r'''Gets items from `start` to `stop` in twelve-tone row.
Returns pitch-class segment.
'''
from abjad.tools import pitchtools
items = self._collection[start:stop]
return PitchClassSegment(
items=items,
item_class=pitchtools.NumberedPitchClass,
)
def __init__(self, key_signature=None):
import abjad
if key_signature is None:
key_signature = abjad.KeySignature('c', 'major')
elif isinstance(key_signature, tuple):
key_signature = abjad.KeySignature(*key_signature)
elif isinstance(key_signature, type(self)):
key_signature = key_signature.key_signature
if not isinstance(key_signature, abjad.KeySignature):
raise Exception(key_signature)
npcs = [key_signature.tonic]
for mdi in key_signature.mode.named_interval_segment[:-1]:
named_pitch_class = npcs[-1] + mdi
npcs.append(named_pitch_class)
PitchClassSegment.__init__(
self,
items=npcs,
item_class=abjad.NamedPitchClass,
)
self._key_signature = key_signature
def __init__(self, *args):
if len(args) == 0:
key_signature = indicatortools.KeySignature('c', 'major')
elif len(args) == 1 and isinstance(args[0],
indicatortools.KeySignature):
key_signature = args[0]
elif len(args) == 1 and isinstance(args[0], Scale):
key_signature = args[0].key_signature
elif len(args) == 2:
key_signature = indicatortools.KeySignature(*args)
else:
raise TypeError
npcs = [key_signature.tonic]
for mdi in key_signature.mode.named_interval_segment[:-1]:
named_pitch_class = npcs[-1] + mdi
npcs.append(named_pitch_class)
PitchClassSegment.__init__(
self,
items=npcs,
item_class=pitchtools.NamedPitchClass,
)
self._key_signature = key_signature
def __init__(self, *args):
if len(args) == 0:
key_signature = indicatortools.KeySignature('c', 'major')
elif len(args) == 1 and isinstance(
args[0], indicatortools.KeySignature):
key_signature = args[0]
elif len(args) == 1 and isinstance(args[0], Scale):
key_signature = args[0].key_signature
elif len(args) == 2:
key_signature = indicatortools.KeySignature(*args)
else:
raise TypeError
npcs = [key_signature.tonic]
for mdi in key_signature.mode.named_interval_segment[:-1]:
named_pitch_class = npcs[-1] + mdi
npcs.append(named_pitch_class)
PitchClassSegment.__init__(
self,
items=npcs,
item_class=pitchtools.NamedPitchClass,
)
self._key_signature = key_signature
def __rmul__(self, expr):
r'''Multiplies `expr` by twelve-tone row.
Returns pitch-class segment.
'''
return PitchClassSegment(self) * expr
def __rmul__(self, argument):
r'''Multiplies `argument` by row.
.. container:: example
Multiplies integer by row:
>>> row = abjad.TwelveToneRow()
>>> abjad.show(row) # doctest: +SKIP
>>> segment = row * 2
>>> abjad.show(segment) # doctest: +SKIP
.. docs::
>>> lilypond_file = segment.__illustrate__()
>>> abjad.f(lilypond_file[abjad.Voice])
\new Voice
{
c'8
cs'8
d'8
ef'8
e'8
f'8
fs'8
g'8
af'8
a'8
bf'8
b'8
c'8
cs'8
d'8
ef'8
e'8
f'8
fs'8
g'8
af'8
a'8
bf'8
b'8
\bar "|." %! SCORE1
\override Score.BarLine.transparent = ##f
}
.. container:: example
Multiplies integer by row:
>>> numbers = [1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8, 0]
>>> row = abjad.TwelveToneRow(numbers)
>>> abjad.show(row) # doctest: +SKIP
>>> segment = row * 2
>>> abjad.show(segment) # doctest: +SKIP
.. docs::
>>> lilypond_file = segment.__illustrate__()
>>> abjad.f(lilypond_file[abjad.Voice])
\new Voice
{
cs'8
b'8
a'8
ef'8
fs'8
g'8
f'8
e'8
bf'8
d'8
af'8
c'8
cs'8
b'8
a'8
ef'8
fs'8
g'8
f'8
e'8
bf'8
d'8
af'8
c'8
\bar "|." %! SCORE1
\override Score.BarLine.transparent = ##f
}
.. container:: example
Returns pitch-class segment:
>>> segment
PitchClassSegment([1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8, 0, 1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8, 0])
'''
return PitchClassSegment(self) * argument
def __getitem__(self, argument):
r'''Gets item or slice identified by `argument`.
.. container:: example
Example row:
>>> numbers = [1, 11, 9, 3, 6, 7, 5, 4, 10, 2, 8, 0]
>>> row = abjad.TwelveToneRow(numbers)
>>> abjad.show(row) # doctest: +SKIP
.. container:: example
Gets first hexachord:
>>> abjad.show(row[:6]) # doctest: +SKIP
PitchClassSegment([0, 1, 11, 9, 3, 6])
.. docs::
>>> lilypond_file = row[:6].__illustrate__()
>>> abjad.f(lilypond_file[abjad.Voice])
\new Voice
{
cs'8
b'8
a'8
ef'8
fs'8
g'8
\bar "|." %! SCORE1
\override Score.BarLine.transparent = ##f
}
.. container:: example
Gets second hexachord:
>>> abjad.show(row[-6:]) # doctest: +SKIP
.. docs::
>>> lilypond_file = row[-6:].__illustrate__()
>>> abjad.f(lilypond_file[abjad.Voice])
\new Voice
{
f'8
e'8
bf'8
d'8
af'8
c'8
\bar "|." %! SCORE1
\override Score.BarLine.transparent = ##f
}
.. container:: example
Returns pitch-class segment:
>>> row[-6:]
PitchClassSegment([5, 4, 10, 2, 8, 0])
'''
from abjad.tools import pitchtools
item = self._collection.__getitem__(argument)
try:
return PitchClassSegment(
items=item,
item_class=pitchtools.NumberedPitchClass,
)
except TypeError:
return item
