def make_part_tuplet():
# create a part
part = score.Part('My Part')
# create contents
divs = 12
ts = score.TimeSignature(3, 4)
page1 = score.Page(1)
system1 = score.System(1)
note1 = score.Note(id='n0', step='A', octave=4, voice=1, staff=1)
rest1 = score.Rest(voice=1, staff=1)
note2 = score.Note(id='n2', step='C', octave=4, voice=1, staff=1)
rest2 = score.Rest(id='r0', voice=1, staff=1)
# and add the contents to the part:
part.set_quarter_duration(0, divs)
part.add(ts, 0)
part.add(page1, 0)
part.add(system1, 0)
part.add(note1, 0, 8)
part.add(rest1, 8, 16)
part.add(note2, 16, 24)
part.add(rest2, 24, 36)
score.add_measures(part)
score.find_tuplets(part)
score.set_end_times(part)
return part
def test_export_import_pprint(self):
# create a part
part1 = score.Part('My Part')
# create contents
divs = 10
ts = score.TimeSignature(3, 4)
page1 = score.Page(1)
system1 = score.System(1)
measure1 = score.Measure(number=1)
note1 = score.Note(step='A', octave=4, voice=1, staff=1)
rest1 = score.Rest(voice=1, staff=1)
note2 = score.Note(step='C', octave=5, alter=-1, voice=2, staff=1)
# and add the contents to the part:
part1.set_quarter_duration(0, divs)
part1.add(ts, 0)
part1.add(measure1, 0, 30)
part1.add(page1, 0)
part1.add(system1, 0)
part1.add(note1, 0, 15)
part1.add(rest1, 15, 30)
part1.add(note2, 0, 30)
score.set_end_times(part1)
# pretty print the part
pstring1 = part1.pretty()
with TemporaryFile() as f:
# save part to musicxml
save_musicxml(part1, f)
f.flush()
f.seek(0)
# load part from musicxml
part2 = load_musicxml(f)
# pretty print saved/loaded part:
pstring2 = part2.pretty()
# test pretty printed strings for equality
equal = pstring1 == pstring2
if not equal:
show_diff(pstring1, pstring2)
msg = 'Exported and imported score does not yield identical pretty printed representations'
self.assertTrue(equal, msg)
def make_part_slur():
# create a part
part = score.Part('My Part')
# create contents
divs = 12
ts = score.TimeSignature(3, 4)
page1 = score.Page(1)
system1 = score.System(1)
note0 = score.Note(id='n0', step='A', octave=4, voice=1, staff=1)
note1 = score.Note(id='n1', step='A', octave=4, voice=1, staff=1)
note2 = score.Note(id='n2', step='A', octave=4, voice=1, staff=1)
note3 = score.Note(id='n3', step='A', octave=4, voice=1, staff=1)
note4 = score.Note(id='n4', step='A', octave=3, voice=2, staff=1)
note5 = score.Note(id='n5', step='A', octave=3, voice=2, staff=1)
slur1 = score.Slur(start_note=note0, end_note=note5)
slur2 = score.Slur(start_note=note4, end_note=note3)
# and add the contents to the part:
part.set_quarter_duration(0, divs)
part.add(ts, 0)
part.add(page1, 0)
part.add(system1, 0)
part.add(note0, 0, 12)
part.add(note1, 12, 24)
part.add(note2, 24, 36)
part.add(note3, 36, 48)
part.add(note4, 0, 6)
part.add(note5, 6, 33)
part.add(slur1,
slur1.start_note.start.t,
slur1.end_note.end.t)
part.add(slur2,
slur2.start_note.start.t,
slur2.end_note.end.t)
score.add_measures(part)
score.tie_notes(part)
score.set_end_times(part)
return part
def _parse_parts(document, part_dict):
"""
Populate the Part instances that are the values of `part_dict` with the
musical content in document.
Parameters
----------
document : lxml.etree.ElementTree
The ElementTree representation of the MusicXML document
part_dict : dict
A dictionary with key--value pairs (part_id, Part instance), as returned
by the _parse_partlist() function.
"""
for part_el in document.findall('part'):
part_id = part_el.get('id', 'P1')
part = part_dict.get(part_id, score.Part(part_id))
position = 0
ongoing = {}
# add new page and system at start of part
_handle_new_page(position, part, ongoing)
_handle_new_system(position, part, ongoing)
for measure_el in part_el.xpath('measure'):
position = _handle_measure(measure_el, position, part, ongoing)
# remove unfinished elements from the timeline
for k, o in ongoing.items():
if k not in ('page', 'system'):
if isinstance(o, list):
for o_i in o:
part.remove(o_i)
else:
part.remove(o)
# set end times for various musical elements that only have a start time
# when constructed from MusicXML
score.set_end_times(part)
def _parse_parts(document, part_dict):
"""
Populate the Part instances that are the values of `part_dict` with the
musical content in document.
Parameters
----------
document : lxml.etree.ElementTree
The ElementTree representation of the MusicXML document
part_dict : dict
A dictionary with key--value pairs (part_id, Part instance), as returned
by the _parse_partlist() function.
"""
for part_el in document.findall("part"):
part_id = part_el.get("id", "P1")
part = part_dict.get(part_id, score.Part(part_id))
position = 0
ongoing = {}
doc_order = 0
# add new page and system at start of part
_handle_new_page(position, part, ongoing)
_handle_new_system(position, part, ongoing)
for measure_el in part_el.xpath("measure"):
position, doc_order = _handle_measure(measure_el, position, part,
ongoing, doc_order)
# remove unfinished elements from the timeline
for k, o in ongoing.items():
if k not in ("page", "system"):
if isinstance(o, list):
for o_i in o:
part.remove(o_i)
else:
part.remove(o)
# check whether all grace notes have a main note
for gn in part.iter_all(score.GraceNote):
if gn.main_note is None:
for no in part.iter_all(
score.Note,
include_subclasses=False,
start=gn.start.t,
end=gn.start.t + 1,
):
if no.voice == gn.voice:
gn.last_grace_note_in_seq.grace_next = no
if gn.main_note is None:
print(
"grace note without recoverable same voice main note: {}".
format(gn))
print("might be cadenza notation")
# set end times for various musical elements that only have a start time
# when constructed from MusicXML
score.set_end_times(part)