ReduceChords -- work on notes in streams

music21/analysis/reduceChords.py

@@ -276,11 +276,11 @@ def collapseArpeggios(self, scoreTree):
             elif one.measureNumber != two.measureNumber:
                 continue
 
-            # is this used?
-            bothPitches = set()
-            bothPitches.update([x.nameWithOctave for x in onePitches])
-            bothPitches.update([x.nameWithOctave for x in twoPitches])
-            bothPitches = sorted([pitch.Pitch(x) for x in bothPitches])
+            # # is this used?
+            # bothPitches = set()
+            # bothPitches.update([x.nameWithOctave for x in onePitches])
+            # bothPitches.update([x.nameWithOctave for x in twoPitches])
+            # bothPitches = sorted([pitch.Pitch(x) for x in bothPitches])
 
             # if not timespanStream.Verticality.pitchesAreConsonant(bothPitches):
             #    intervalClasses = self._getIntervalClassSet(bothPitches)
@@ -359,10 +359,7 @@ def computeMeasureChordWeights(
         self.numberOfElementsInMeasure = len(measureObject)
         for i, c in enumerate(measureObject):
             self.positionInMeasure = i
-            if c.isNote:
-                p = tuple(c.pitch.pitchClass)
-            else:
-                p = tuple({x.pitchClass for x in c.pitches})
+            p = tuple({x.pitchClass for x in c.pitches})
             if p not in presentPCs:
                 presentPCs[p] = 0.0
             presentPCs[p] += weightAlgorithm(c)
@@ -582,13 +579,8 @@ def reduceMeasureToNChords(
         currentGreedyChord = None
         currentGreedyChordPCs = None
         currentGreedyChordNewLength = 0.0
-        for c in measureObject:
-            if isinstance(c, note.Note):
-                p = tuple(c.pitch.pitchClass)
-            elif isinstance(c, chord.Chord):
-                p = tuple({x.pitchClass for x in c.pitches})
-            else:
-                continue
+        for c in measureObject.getElementsByClass(note.NotRest):
+            p = tuple({x.pitchClass for x in c.pitches})
             if p in trimmedMaxChords and p != currentGreedyChordPCs:
                 # keep this chord
                 if currentGreedyChord is None and c.offset != 0.0:
@@ -609,7 +601,7 @@ def reduceMeasureToNChords(
                 measureObject.remove(c)
         if currentGreedyChord is not None:
             currentGreedyChord.quarterLength = currentGreedyChordNewLength
-            # not read later - no need to cleanup.
+            # not read later - no need to clean up.
             # currentGreedyChordNewLength = 0.0
         # even chord lengths
         for i in range(1, len(measureObject)):

music21/analysis/reduceChordsOld.py

@@ -63,6 +63,7 @@ def reduceMeasureToNChords(self,
                                weightAlgorithm=None,
                                trimBelow=0.25):
         '''
+        Takes a measure and reduces it to only one chord or `numChords` chords.
 
         >>> s = analysis.reduceChordsOld.testMeasureStream1()
         >>> cr = analysis.reduceChordsOld.ChordReducer()
@@ -110,10 +111,7 @@ def reduceMeasureToNChords(self,
         currentGreedyChordPCs = None
         currentGreedyChordNewLength = 0.0
         for c in mObj:
-            if c.isNote:
-                p = tuple(c.pitch.pitchClass)
-            else:
-                p = tuple({x.pitchClass for x in c.pitches})
+            p = tuple({x.pitchClass for x in c.pitches})
             if p in trimmedMaxChords and p != currentGreedyChordPCs:
                 # keep this chord
                 if currentGreedyChord is None and c.offset != 0.0:
@@ -200,10 +198,7 @@ def computeMeasureChordWeights(self, measureObj, weightAlgorithm=None):
 
         for i, c in enumerate(measureObj):
             self.positionInMeasure = i
-            if c.isNote:
-                p = tuple(c.pitch.pitchClass)
-            else:
-                p = tuple({x.pitchClass for x in c.pitches})
+            p = tuple({x.pitchClass for x in c.pitches})
             if p not in presentPCs:
                 presentPCs[p] = 0.0
             presentPCs[p] += weightAlgorithm(c)
@@ -317,7 +312,7 @@ def reduceThisMeasure(self, mI, measureIndex, maxChords, closedPosition, forceOc
                     for pitchI in range(len(self._lastPitchedObject)):
                         if self._lastPitchedObject.pitches[pitchI] != firstPitched.pitches[pitchI]:
                             allSame = False
-                    if allSame is True:
+                    if allSame:
                         self._lastPitchedObject.tie = tie.Tie('start')
         self._lastPitchedObject = m[-1]
 

music21/clef.py

@@ -967,27 +967,21 @@ def findHeight(pInner):
         return height
     # environLocal.printDebug(['calling bestClef()'])
 
-    totalNotes = 0
+    totalPitches = 0
     totalHeight = 0
 
     sIter = streamObj.recurse() if recurse else streamObj.iter()
 
     notes = sIter.notesAndRests
 
     for n in notes:
-        if n.isRest:
-            pass
-        elif n.isNote:
-            totalNotes += 1
-            totalHeight += findHeight(n.pitch)
-        elif n.isChord:
-            for p in n.pitches:
-                totalNotes += 1
-                totalHeight += findHeight(p)
-    if totalNotes == 0:
+        for p in n.pitches:
+            totalPitches += 1
+            totalHeight += findHeight(p)
+    if totalPitches == 0:
         averageHeight = 29.0
     else:
-        averageHeight = totalHeight / totalNotes
+        averageHeight = totalHeight / totalPitches
 
     # environLocal.printDebug(['average height', averageHeight])
     if averageHeight > 49:  # value found with experimentation; revise

music21/omr/correctors.py

@@ -761,11 +761,10 @@ def getHashString(self):
                 hashString += self.hashGrace(n)
             elif n.isNote:
                 hashString += self.hashNote(n)
-            elif not n.isNote:
-                if n.isRest:
-                    hashString += self.hashRest(n)
-                elif n.isChord:
-                    hashString += self.hashNote(n)
+            elif n.isRest:
+                hashString += self.hashRest(n)
+            elif n.isChord:
+                hashString += self.hashNote(n)
         self.hashString = hashString
         return hashString
 

music21/search/base.py

@@ -698,7 +698,7 @@ def translateStreamToString(inputStreamOrIterator, returnMeasures=False):
         b += translateNoteWithDurationToBytes(n)
         if returnMeasures:
             measures.append(n.measureNumber)
-    if returnMeasures is False:
+    if not returnMeasures:
         return b
     else:
         return (b, measures)
@@ -750,7 +750,7 @@ def translateDiatonicStreamToString(inputStreamOrIterator, returnMeasures=False)
             mNum = n.measureNumber
 
         if n.isRest:
-            if previousRest is True:
+            if previousRest:
                 continue
             else:
                 previousRest = True
@@ -759,7 +759,7 @@ def translateDiatonicStreamToString(inputStreamOrIterator, returnMeasures=False)
                 continue
         else:
             previousRest = False
-        if previousTie is True:
+        if previousTie:
             if n.tie is None or n.tie.type == 'stop':
                 previousTie = False
             continue
@@ -778,7 +778,7 @@ def translateDiatonicStreamToString(inputStreamOrIterator, returnMeasures=False)
         b.append(newName)
 
     joined = ''.join(b)
-    if returnMeasures is False:
+    if not returnMeasures:
         return joined
     else:
         return (joined, measures)
@@ -822,21 +822,20 @@ def translateIntervalsAndSpeed(inputStream, returnMeasures=False):
     b = []
     measures = []
 
-    previousRest = False
-    previousTie = False
+    previousRest = False  # was the previous a Rest
+    previousTie = False  # was the previous a Tie?
     previousQL = None
     previousMidi = 60
-    for n in inputStream:
-        if n.isNote:
-            previousMidi = n.pitches[0].midi
-            break
+    for n in inputStream.getElementsByClass(note.Note):
+        previousMidi = n.pitches[0].midi
+        break
 
     for n in inputStream:
         mNum = None
         if returnMeasures:
             mNum = n.measureNumber
         if n.isRest:
-            if previousRest is True:
+            if previousRest:
                 continue
             else:
                 previousRest = True
@@ -845,7 +844,7 @@ def translateIntervalsAndSpeed(inputStream, returnMeasures=False):
                 continue
         else:
             previousRest = False
-        if previousTie is True:
+        if previousTie:
             if n.tie is None or n.tie.type == 'stop':
                 previousTie = False
             continue
@@ -870,7 +869,7 @@ def translateIntervalsAndSpeed(inputStream, returnMeasures=False):
         b.append(newName)
 
     joined = ''.join(b)
-    if returnMeasures is False:
+    if not returnMeasures:
         return joined
     else:
         return (joined, measures)
@@ -928,10 +927,10 @@ def translateStreamToStringOnlyRhythm(inputStream, returnMeasures=False):
         return b
 
 
-def translateNoteToByte(n: note.GeneralNote):
+def translateNoteToByte(n: note.GeneralNote) -> str:
     # noinspection PyShadowingNames
     '''
-    takes a note.Note object and translates it to a single byte representation.
+    takes a note.Note object and translates it to a single byte representation in a string.
 
     currently returns the chr() for the note's midi number. or chr(127) for rests
     and unpitched.
@@ -957,10 +956,10 @@ def translateNoteToByte(n: note.GeneralNote):
     else:
         return chr(127)
 
-def translateNoteWithDurationToBytes(n: note.GeneralNote, includeTieByte=True):
+def translateNoteWithDurationToBytes(n: note.GeneralNote, includeTieByte: bool = True) -> str:
     # noinspection PyShadowingNames
     '''
-    takes a note.Note object and translates it to a three-byte representation.
+    takes a note.Note object and translates it to a three-byte representation as a string.
 
     currently returns the chr() for the note's midi number. or chr(127) for rests
     followed by the log of the quarter length (fitted to 1-127, see
@@ -987,7 +986,7 @@ def translateNoteWithDurationToBytes(n: note.GeneralNote, includeTieByte=True):
     firstByte = translateNoteToByte(n)
     secondByte = translateDurationToBytes(n)
     thirdByte = translateNoteTieToByte(n)
-    if includeTieByte is True:
+    if includeTieByte:
         return firstByte + secondByte + thirdByte
     else:
         return firstByte + secondByte
@@ -1098,7 +1097,6 @@ def mostCommonMeasureRhythms(streamIn, transposeDiatonic=False):
     * Changed in v7: bars are ordered first by number, then by part.
     '''
     returnDicts = []
-    distanceToTranspose = 0
 
     for thisMeasure in streamIn[Measure]:
         rhythmString = translateStreamToStringOnlyRhythm(thisMeasure.notesAndRests)
@@ -1109,7 +1107,7 @@ def mostCommonMeasureRhythms(streamIn, transposeDiatonic=False):
                 entry['number'] += 1
                 entry['measures'].append(thisMeasure)
                 break
-        if rhythmFound is False:
+        if not rhythmFound:
             newDict = {
                 'number': 1,
                 'rhythmString': rhythmString,