def xtestSnippetShow(self):
'''
testing a fake snippet in and MusicXML out
'''
block1 = ['e4 f g a', 'g4 a b cc', '', 'no-cadence', '2/4']
bs = BallataSheet()
dummyPiece = bs.makeWork(2)
block2 = dummyPiece.convertBlockToStreams(block1)
unused_fpc1 = polyphonicSnippet.FrontPaddedSnippet(block2, dummyPiece)
def getSnippetAtPosition(self, snippetPosition, snippetType="end"):
'''
gets a "snippet" which is a collection of up to 3 lines of music, a timeSignature
and a description of the cadence.
>>> bs = alpha.trecento.cadencebook.BallataSheet()
>>> accur = bs.makeWork(2)
>>> print(accur.getSnippetAtPosition(12))
<music21.alpha.trecento.polyphonicSnippet.FrontPaddedSnippet ...>
'''
if self.rowvalues[snippetPosition].strip() != "":
thisBlock = self.rowvalues[snippetPosition:snippetPosition + 5]
if thisBlock[4].strip() == "":
if self.timeSigBegin == "":
return None ## need a timesig
thisBlock[4] = self.timeSigBegin
blockOut = self.convertBlockToStreams(thisBlock)
if snippetType == 'begin':
return polyphonicSnippet.Incipit(blockOut, self)
else:
return polyphonicSnippet.FrontPaddedSnippet(blockOut, self)