def clefFromClefSign(self, clefSign):
'''
returns a :class:`~music21.clef.Clef` object or subclass from a <clefSign> tag.
>>> ci = capella.fromCapellaXML.CapellaImporter()
>>> clefSign = ci.domElementFromText('<clefSign clef="treble"/>')
>>> ci.clefFromClefSign(clefSign)
<music21.clef.TrebleClef>
>>> clefSign = ci.domElementFromText('<clefSign clef="G2-"/>')
>>> ci.clefFromClefSign(clefSign)
<music21.clef.Treble8vbClef>
>>> clefSign = ci.domElementFromText('<clefSign clef="F1+"/>')
>>> clefObject = ci.clefFromClefSign(clefSign)
>>> clefObject
<music21.clef.FClef>
>>> clefObject.sign
'F'
>>> clefObject.line
1
>>> clefObject.octaveShift
1
'''
if 'clef' in clefSign._attrs:
clefValue = clefSign._attrs['clef'].value
if clefValue in self.clefMapping:
return self.clefMapping[clefValue]()
elif clefValue[0] == 'p':
return clef.PercussionClef()
elif len(clefValue) > 1:
clefSignAndLine = clefValue[0:2]
clefOctaveChange = 0
if len(clefValue) > 2:
if clefValue[2] == '+':
clefOctaveChange = 1
elif clefValue[2] == '-':
clefOctaveChange = -1
clefObj = clef.clefFromString(clefSignAndLine,
clefOctaveChange)
return clefObj
return None
def test_clef_to_lily_17(self):
bee_ell = clef.PercussionClef()
expected = u"\\clef percussion\n"
self.assertEqual(functions.clef_to_lily(bee_ell), expected)