def conditionalAdd(ts, n: note.Note) -> None:
'''
Add an element only if it is not already in the chord.
If it has more tie information than the previously
added note, then remove the previously added note and add it
'''
from music21 import stream
nonlocal pitchBust # love Py3!!!
p = n.pitch
pitchKey = p.nameWithOctave
pitchGroup = None
if addPartIdAsGroup:
partContext = n.getContextByClass(stream.Part)
if partContext is not None:
pidStr = str(partContext.id)
pitchGroup = pidStr.replace(
' ', '_') # spaces are not allowed as group names
n.pitch.groups.append(pitchGroup)
n.groups.append(pitchGroup)
if pitchKey not in seenPitches:
seenPitches.add(pitchKey)
notesToAdd[pitchKey] = newNote(ts, n)
return
elif not removeRedundantPitches:
notesToAdd[pitchKey + str(pitchBust)] = newNote(ts, n)
pitchBust += 1
return
elif addPartIdAsGroup and pitchGroup is not None:
notesToAdd[pitchKey].groups.append(pitchGroup)
notesToAdd[pitchKey].pitch.groups.append(pitchGroup)
if not addTies:
return
# else add derivation once multiple derivations are allowed.
oldNoteTie = notesToAdd[pitchKey].tie
if oldNoteTie is not None and oldNoteTie.type == 'continue':
return # previous note was as good or better
possibleNewNote = newNote(ts, n)
possibleNewNote.groups = notesToAdd[pitchKey].groups
if possibleNewNote.tie is None:
return # do nothing
elif oldNoteTie is None:
notesToAdd[pitchKey] = possibleNewNote # a better note to add
elif {oldNoteTie.type, possibleNewNote.tie.type} == startStopSet:
notesToAdd[pitchKey].tie.type = 'continue'
elif possibleNewNote.tie.type == 'continue':
notesToAdd[pitchKey] = possibleNewNote # a better note to add
elif possibleNewNote.tie.type == oldNoteTie.type:
return
else:
raise VerticalityException('Did I miss one? ',
possibleNewNote.tie, oldNoteTie)
