def convertBlockToStreams(self, thisBlock):
'''
Takes a block of music information (in
:class:`~music21.alpha.trecento.trecentoCadence.TrecentoCadenceStream` notation)
and returns a list of Streams and other information
>>> block1 = ['e4 f g a', 'g4 a b cc', '', 'no-cadence', '2/4']
>>> bs = alpha.trecento.cadencebook.BallataSheet()
>>> dummyPiece = bs.makeWork(2)
>>> blockStreams = dummyPiece.convertBlockToStreams(block1)
>>> for x in blockStreams:
... print(x)
<music21.stream.Part ...>
<music21.stream.Part ...>
None
no-cadence
2/4
>>> blockStreams[0].show('text')
{0.0} <music21.stream.Measure 1 offset=0.0>
{0.0} <music21.clef.TrebleClef>
{0.0} <music21.meter.TimeSignature 2/4>
{0.0} <music21.note.Note E>
{1.0} <music21.note.Note F>
{2.0} <music21.stream.Measure 2 offset=2.0>
{0.0} <music21.note.Note G>
{1.0} <music21.note.Note A>
{2.0} <music21.bar.Barline style=final>
'''
returnBlock = [None, None, None, None, None]
currentTimeSig = thisBlock[4]
returnBlock[4] = currentTimeSig
returnBlock[3] = thisBlock[3]
for i in range(3):
thisVoice = thisBlock[i]
thisVoice = thisVoice.strip()
if (thisVoice):
try:
returnBlock[i] = trecentoCadence.CadenceConverter(
currentTimeSig + " " + thisVoice).parse().stream
except duration.DurationException as value:
raise duration.DurationException(
"Problems in line %s: specifically %s" %
(thisVoice, value))
# except Exception, (value):
# raise Exception("Unknown Problems in line %s: specifically %s" %
# (thisVoice, value))
return returnBlock
def convertBlockToStreams(self, thisBlock):
'''
Takes a block of music information (in :class:`~music21.trecento.trecentoCadence.TrecentoCadenceStream` notation)
and returns a list of Streams and other information
>>> block1 = ['e4 f g a', 'g4 a b cc', '', 'no-cadence', '2/4']
>>> bs = trecento.cadencebook.BallataSheet()
>>> dummyPiece = bs.makeWork(2)
>>> blockStreams = dummyPiece.convertBlockToStreams(block1)
>>> for x in blockStreams:
... print(x)
<music21.trecento.trecentoCadence.TrecentoCadenceStream ...>
<music21.trecento.trecentoCadence.TrecentoCadenceStream ...>
None
no-cadence
2/4
>>> blockStreams[0].show('text')
{0.0} <music21.meter.TimeSignature 2/4>
{0.0} <music21.note.Note E>
{1.0} <music21.note.Note F>
{2.0} <music21.note.Note G>
{3.0} <music21.note.Note A>
'''
returnBlock = [None, None, None, None, None]
currentTimeSig = thisBlock[4]
returnBlock[4] = currentTimeSig
returnBlock[3] = thisBlock[3]
for i in range(0,3):
thisVoice = thisBlock[i]
thisVoice = thisVoice.strip()
if (thisVoice):
try:
returnBlock[i] = trecentoCadence.TrecentoCadenceStream(thisVoice, currentTimeSig)
except duration.DurationException, (value):
raise duration.DurationException("Problems in line %s: specifically %s" % (thisVoice, value))
def __init__(self, stringRep="", timeSignature=None):
stream.Stream.__init__(self)
self.stringRep = stringRep
noteStrs = self.stringRep.split()
self.setupRegularExpressions()
if (timeSignature is None):
barDuration = duration.Duration()
barDuration.type = "whole" ## assume 4/4
elif (hasattr(timeSignature,
"barDuration")): # is a TimeSignature object
barDuration = timeSignature.barDuration
else: # is a string
timeSignature = meter.TimeSignature(timeSignature)
barDuration = timeSignature.barDuration
noteList = []
if timeSignature is not None and hasattr(timeSignature, "barDuration"):
noteList.append(timeSignature)
parseStatus = {
'inTrip': False,
'inQuad': False,
'beginTuplet': False,
'endTuplet': False,
'lastDuration': None,
'barDuration': barDuration,
'lastNoteTied': False,
}
for thisNoteStr in noteStrs:
if self.TRIP.match(thisNoteStr):
thisNoteStr = self.TRIP.sub('', thisNoteStr)
parseStatus['inTrip'] = True
parseStatus['beginTuplet'] = True
elif self.QUAD.match(thisNoteStr):
thisNoteStr = self.QUAD.sub('', thisNoteStr)
parseStatus['inQuad'] = True
parseStatus['beginTuplet'] = True
elif self.ENDBRAC.search(thisNoteStr):
thisNoteStr = self.ENDBRAC.sub('', thisNoteStr)
parseStatus['endTuplet'] = True
elif self.TIMESIG.match(thisNoteStr):
newTime = self.TIMESIG.match(thisNoteStr).group(1)
timeSignature = meter.TimeSignature(newTime)
barDuration = timeSignature.barDuration
parseStatus['barDuration'] = barDuration
noteList.append(timeSignature)
continue
tN = None
try:
tN = self.getNote(thisNoteStr, parseStatus)
except duration.DurationException as value:
raise duration.DurationException(
str(value) + " in context " + str(thisNoteStr))
# except Exception, (value):
# raise Exception(str(value) + "in context " + str(thisNoteStr) + ": " + str(stringRep) )
#try:
noteList.append(tN.note)
#except TinyNotationException:
# raise TinyNotationException(thisNoteStr + " " + str(noteStrs))
if parseStatus['endTuplet'] == True:
parseStatus['endTuplet'] = False
if parseStatus['inTrip'] == True:
parseStatus['inTrip'] = False
elif parseStatus['inQuad'] == True:
parseStatus['inQuad'] = False
else:
raise TinyNotationException(
"unexpected end bracket in TinyNotationStream")
parseStatus['beginTuplet'] = False
for thisNote in noteList:
self.append(thisNote)