def __init__(self, payload):
from abjad import abjad_configuration
if isinstance(payload, str):
self._payload = payload
else:
payload = copy.deepcopy(payload)
lilypond_file = iotools.insert_expr_into_lilypond_file(payload)
lilypond_file.file_initial_system_comments[:] = []
lilypond_version_token = lilypondfiletools.LilyPondVersionToken(
abjad_configuration.get_lilypond_minimum_version_string(),
)
lilypond_file.file_initial_system_includes[0] = lilypond_version_token
lilypond_format = lilypond_file.lilypond_format
self._payload = lilypond_format
def write_expr_to_ly(
expr,
file_name,
print_status=False,
tagline=False,
docs=False,
):
r'''Writes `expr` to `file_name`.
::
>>> note = Note("c'4")
>>> iotools.write_expr_to_ly(note, '/home/user/foo.ly') # doctest: +SKIP
Returns none.
'''
from abjad.tools import iotools
file_name = os.path.expanduser(file_name)
if not file_name.endswith('.ly'):
file_name += '.ly'
try:
outfile = open(file_name, 'w')
if docs:
expr = documentationtools.make_reference_manual_lilypond_file(expr)
lilypond_file = iotools.insert_expr_into_lilypond_file(
expr, tagline=tagline)
# the following line is necessary for Windows *not* to keep
# outfile open after writing;
# why this should be the case is, however, a complete mystery.
output = lilypond_file.lilypond_format
outfile.write(output)
outfile.close()
except IOError:
print 'ERROR: cound not open file %s' % file_name
dirname = os.path.dirname(file_name)
if dirname:
print 'Make sure "%s" exists in your system.' % dirname
if print_status:
print 'LilyPond file written to %r ...' % os.path.basename(file_name)
def play(expr):
r'''Plays `expr`.
::
>>> note = Note("c'4")
::
>>> iotools.play(note) # doctest: +SKIP
This input creates and opens a one-note MIDI file.
Abjad outputs MIDI files of the format ``filename.mid``
under Windows.
Abjad outputs MIDI files of the format ``filename.midi``
under other operating systems.
Returns none.
'''
from abjad import abjad_configuration
from abjad.tools import iotools
ABJADOUTPUT = abjad_configuration['abjad_output']
iotools.verify_output_directory(ABJADOUTPUT)
os.chdir(ABJADOUTPUT)
name = iotools.get_next_output_file_name()
outfile = open(name, 'w')
lilypond_file = iotools.insert_expr_into_lilypond_file(expr)
lilypond_file.score_block.append(lilypondfiletools.MIDIBlock())
outfile.write(lilypond_file.lilypond_format)
outfile.close()
iotools.run_lilypond(name, abjad_configuration['lilypond_path'])
if os.name == 'nt':
extension = 'mid'
else:
extension = 'midi'
midi_player = abjad_configuration['midi_player']
iotools.open_file('%s.%s' % (name[:-3], extension), midi_player)
