Run m21 tests on 3.14

.github/workflows/maincheck.yml

@@ -14,7 +14,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: [3.11, 3.12, 3.13]
+                python-version: [3.11, 3.12, 3.13, 3.14]
         steps:
         - uses: actions/setup-python@v4
           with:
@@ -40,7 +40,7 @@ jobs:
             - name: Set up Python
               uses: actions/setup-python@v4
               with:
-                  python-version: '3.13'
+                  python-version: '3.14'
                   cache: 'pip'
             - name: Install dependencies
               run: |
@@ -63,7 +63,7 @@ jobs:
             - name: Set up Python
               uses: actions/setup-python@v4
               with:
-                  python-version: '3.13'
+                  python-version: '3.14'
                   cache: 'pip'
             - name: Install dependencies
               run: |
@@ -83,7 +83,7 @@ jobs:
             - name: Set up Python
               uses: actions/setup-python@v4
               with:
-                  python-version: '3.13'
+                  python-version: '3.14'
                   cache: 'pip'
             - name: Install dependencies
               run: |

music21/__init__.py

@@ -53,7 +53,7 @@
     If you have the wrong version there are several options for getting
     the right one.
 
-    - 1. (Best) Upgrade to a recent version of Python 3 (such as 3.13).
+    - 1. (Best) Upgrade to a recent version of Python 3 (such as 3.14).
 
          The great features there will more
          than make up for the headache of downloading

music21/pitch.py

@@ -2103,6 +2103,8 @@ def __lt__(self, other) -> bool:
         >>> a < b
         True
         '''
+        if not isinstance(other, Pitch):
+            return NotImplemented
         if self.ps < other.ps:
             return True
         else:
@@ -2133,7 +2135,12 @@ def __le__(self, other) -> bool:
         Do not rely on this behavior -- it may be changed in a future version
         to create a total ordering.
         '''
-        return self.__lt__(other) or self.__eq__(other)
+        lt_result = self.__lt__(other)
+        if lt_result is NotImplemented:
+            return NotImplemented
+        if lt_result:
+            return True
+        return self.__eq__(other)
 
     def __gt__(self, other) -> bool:
         '''
@@ -2145,6 +2152,9 @@ def __gt__(self, other) -> bool:
         >>> a > b
         False
         '''
+        if not isinstance(other, Pitch):
+            return NotImplemented
+
         if self.ps > other.ps:
             return True
         else:
@@ -2177,7 +2187,13 @@ def __ge__(self, other) -> bool:
         Do not rely on this behavior -- it may be changed in a future version
         to create a total ordering.
         '''
-        return self.__gt__(other) or self.__eq__(other)
+        gt_result = self.__gt__(other)
+        if gt_result is NotImplemented:
+            return NotImplemented
+        if gt_result:
+            return True
+
+        return self.__eq__(other)
 
     # --------------------------------------------------------------------------
     @property