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 make_desordre_score(pitches):
'''Makes Désordre score.
'''
assert len(pitches) == 2
staff_group = scoretools.StaffGroup()
staff_group.context_name = 'PianoStaff'
# build the music
for hand in pitches:
staff = abjad.demos.desordre.make_desordre_staff(hand)
staff_group.append(staff)
# set clef and key signature to left hand staff
clef = indicatortools.Clef('bass')
attach(clef, staff_group[1])
key_signature = indicatortools.KeySignature('b', 'major')
attach(key_signature, staff_group[1])
# wrap the piano staff in a score
score = scoretools.Score([staff_group])
return score
def key(self, notename_pitch, number_list):
r'''Handles LilyPond ``\key`` command.
'''
if number_list is None:
number_list = 'major'
return indicatortools.KeySignature(notename_pitch, number_list)