def _expr_to_expression(self, expr):
from abjad.tools import rhythmmakertools
from experimental.tools import musicexpressiontools
if isinstance(expr, musicexpressiontools.Expression):
return expr
elif self._all_are_expressions(expr):
return musicexpressiontools.ExpressionInventory(expr)
elif isinstance(expr,
(tuple, list, datastructuretools.TypedList)):
return musicexpressiontools.IterablePayloadExpression(expr)
elif isinstance(expr, (str)):
component = iotools.parse(expr)
return musicexpressiontools.StartPositionedRhythmPayloadExpression(
[component], start_offset=0)
elif isinstance(expr, rhythmmakertools.RhythmMaker):
return musicexpressiontools.RhythmMakerExpression(expr)
else:
message = 'do not know how to change {!r} to expression.'
raise TypeError(message.format(expr))
def test_scoretools_make_piano_score_from_leaves_02():
r'''Works with explicit lowest treble pitch.
'''
container = iotools.parse("{ g4 a4 b4 c'4 d'4 r4 a4 g4 }")
container_contents = container[:]
del(container[:])
lowest_treble_pitch = pitchtools.NamedPitch('a')
score, treble_staff, bass_staff = \
scoretools.make_piano_score_from_leaves(
container_contents,
lowest_treble_pitch=lowest_treble_pitch,
)
r'''
\new Score <<
\new PianoStaff <<
\context Staff = "treble" {
\clef "treble"
r4
a4
b4
c'4
d'4
r4
a4
r4
}
\context Staff = "bass" {
\clef "bass"
g4
r4
r4
r4
r4
r4
r4
g4
}
>>
>>
'''
assert testtools.compare(
score,
r'''
\new Score <<
\new PianoStaff <<
\context Staff = "treble" {
\clef "treble"
r4
a4
b4
c'4
d'4
r4
a4
r4
}
\context Staff = "bass" {
\clef "bass"
g4
r4
r4
r4
r4
r4
r4
g4
}
>>
>>
'''
)
