fixing type-A errors

music21/base.py

@@ -800,7 +800,7 @@ def style(self) -> Style:
         return self._style
 
     @style.setter
-    def style(self, newStyle: Style|None):
+    def style(self, newStyle: Style):
         self._style = newStyle
 
     # convenience.

music21/braille/basic.py

@@ -531,7 +531,7 @@ def metronomeMarkToBraille(music21MetronomeMark):
         metroNote = note.Note('C4', quarterLength=music21MetronomeMark.referent.quarterLength)
         brailleNote = noteToBraille(metroNote, showOctave=False)
         metroTrans.append(brailleNote)
-        englishJoined = ' '.join(metroNote.editorial.get(brailleEnglish, []))
+        englishJoined = ' '.join(metroNote.editorial.get('brailleEnglish', []))
         music21MetronomeMark.editorial.brailleEnglish.append(
             f'Metronome Note {englishJoined}'
         )

music21/chord/__init__.py

@@ -4194,7 +4194,8 @@ def setColor(self, value, pitchTarget=None):
         '''
         # assign to base
         if pitchTarget is None and self._notes:
-            self.style.color = value
+            chord_style = self.style
+            chord_style.color = value
             for n in self._notes:
                 n.style.color = value
 

music21/derivation.py

@@ -240,7 +240,7 @@ def chain(self) -> Generator[base.Music21Object, None, None]:
         >>> list(s3.derivation.chain()) == [s2, s1]
         True
         '''
-        orig: Music21Object | None = self.origin
+        orig: base.Music21Object | None = self.origin
         while orig is not None:
             yield orig
             orig = orig.derivation.origin

music21/meter/core.py

@@ -1840,4 +1840,3 @@ def offsetToDepth(self, qLenPos, align='quantize', index: int|None = None):
 if __name__ == '__main__':
     import music21
     music21.mainTest()
-

music21/stream/base.py

@@ -7987,7 +7987,7 @@ def flatten(self: StreamType, retainContainers=False) -> StreamType:
         sNew_derivation.method = method
 
         sNew.derivation = sNew_derivation
-        
+
         # storing .elements in here necessitates
         # create a new, independent cache instance in the flat representation
         sNew._cache = {}

music21/style.py

@@ -102,45 +102,25 @@ def __init__(self) -> None:
         self.dashLength: float|int|None = None
         self.spaceLength: float|int|None = None
 
-    def _getEnclosure(self) -> Enclosure|None:
-        return self._enclosure
 
-    def _setEnclosure(self, value: Enclosure|None):
-        if value is None:
-            self._enclosure = value
-        elif value == Enclosure.NONE:
-            self._enclosure = None
-        elif isinstance(value, Enclosure):
-            self._enclosure = value
-        elif isinstance(value, str):
-            try:
-                enc_value = Enclosure(value.lower())
-            except ValueError as ve:
-                raise TextFormatException(f'Not a supported enclosure: {value!r}') from ve
-
-            self._enclosure = enc_value
-
-        else:
-            raise TextFormatException(f'Not a supported enclosure: {value!r}')
-
-    enclosure = property(_getEnclosure,
-                         _setEnclosure,
-                         doc='''
+    @property
+    def enclosure(self) -> Enclosure|None:
+        '''
         Get or set the enclosure as a style.Enclosure enum or None.
 
-        Valid names are
-        "rectangle"/style.Enclosure.RECTANGLE,
-        "square"/style.Enclosure.SQUARE,
-        "oval"/style.Enclosure.OVAL,
-        "circle"/style.Enclosure.CIRCLE,
-        "bracket"/style.Enclosure.BRACKET,
-        "inverted-bracket"/style.Enclosure.INVERTED_BRACKET (output in musicxml 4 only)
-        None/"none"/style.Enclosure.NONE (returns Python None object)
+        Valid names are:
+
+        * "rectangle"/style.Enclosure.RECTANGLE,
+        * "square"/style.Enclosure.SQUARE,
+        * "oval"/style.Enclosure.OVAL,
+        * "circle"/style.Enclosure.CIRCLE,
+        * "bracket"/style.Enclosure.BRACKET,
+        * "inverted-bracket"/style.Enclosure.INVERTED_BRACKET (output in musicxml 4 only)
+        * None/"none"/style.Enclosure.NONE (returns Python None object)
 
         or the following other shapes with their ALLCAPS Enclosure equivalents:
 
-        triangle, diamond,
-        pentagon, hexagon, heptagon, octagon,
+        triangle, diamond, pentagon, hexagon, heptagon, octagon,
         nonagon, or decagon.
 
         >>> tst = style.TextStyle()
@@ -172,7 +152,27 @@ def _setEnclosure(self, value: Enclosure|None):
         Traceback (most recent call last):
         music21.style.TextFormatException:
             Not a supported enclosure: 4
-        ''')
+        '''
+        return self._enclosure
+
+    @enclosure.setter
+    def enclosure(self, value: Enclosure|None):
+        if value is None:
+            self._enclosure = value
+        elif value == Enclosure.NONE:
+            self._enclosure = None
+        elif isinstance(value, Enclosure):
+            self._enclosure = value
+        elif isinstance(value, str):
+            try:
+                enc_value = Enclosure(value.lower())
+            except ValueError as ve:
+                raise TextFormatException(f'Not a supported enclosure: {value!r}') from ve
+
+            self._enclosure = enc_value
+
+        else:
+            raise TextFormatException(f'Not a supported enclosure: {value!r}')
 
     def _getAbsoluteY(self):
         return self._absoluteY