def lilypond_duration_string(self):
"""
Gets LilyPond duration string.
.. container:: example
Gets LilyPond duration string:
>>> abjad.Duration(3, 16).lilypond_duration_string
'8.'
Raises assignability error when duration is not assignable.
Returns string.
"""
if not self.is_assignable:
raise exceptions.AssignabilityError(self)
undotted_rational = self.equal_or_lesser_power_of_two
if undotted_rational <= 1:
undotted_duration_string = str(undotted_rational.denominator)
elif undotted_rational == type(self)(2, 1):
undotted_duration_string = r'\breve'
elif undotted_rational == type(self)(4, 1):
undotted_duration_string = r'\longa'
elif undotted_rational == type(self)(8, 1):
undotted_duration_string = r'\maxima'
else:
message = 'can not process undotted rational: {}'
message = message.format(undotted_rational)
raise ValueError(message)
dot_count = self.dot_count
dot_string = '.' * dot_count
dotted_duration_string = undotted_duration_string + dot_string
return dotted_duration_string
def written_duration(self, argument):
rational = Duration(argument)
if not rational.is_assignable:
message = 'not assignable duration: {!r}.'
message = message.format(rational)
raise exceptions.AssignabilityError(message)
self._written_duration = rational
def written_duration(self, argument):
duration = Duration(argument)
if not duration.is_assignable:
message = f'not assignable duration: {duration!r}.'
raise exceptions.AssignabilityError(message)
self._written_duration = duration