use typing.Self. Drop python3.10 support

https://gitlab.tandav.me/tandav/notes/-/issues/4603

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ['3.10', '3.11', '3.12']
+        python_version: ['3.11', '3.12']
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5

pyproject.toml

@@ -6,7 +6,7 @@ authors = [
 ]
 description = "set of tools to work with scales, modes, modulations, chord progressions, voice leading, rhythm and more"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 dependencies = [
     "colortool>=0.5.3",
     "opseq>=0.1.2",

src/musiclib/interval.py

@@ -1,12 +1,10 @@
 import functools
-from typing import TypeVar
+from typing import Self
 
 import numpy as np
 
 from musiclib.util.cache import Cached
 
-Self = TypeVar('Self', bound='AbstractInterval')
-
 
 @functools.total_ordering
 class AbstractInterval(Cached):

src/musiclib/intervalset.py

@@ -2,11 +2,11 @@
 
 import pickle
 from typing import TYPE_CHECKING
-from typing import TypeVar
 
 if TYPE_CHECKING:
     from collections.abc import Iterator
     from typing import Any
+    from typing import Self
 
     import svg
 import numpy as np
@@ -17,8 +17,6 @@
 from musiclib.util.cache import Cached
 from musiclib.util.etc import setdefault_path
 
-Self = TypeVar('Self', bound='IntervalSet')
-
 
 class IntervalSet(Cached, ReprSVGMixin):
     def __init__(self, intervals: frozenset[AbstractInterval]) -> None:

src/musiclib/noteset.py

@@ -6,7 +6,7 @@
 from collections.abc import Sequence
 from typing import TYPE_CHECKING
 from typing import Any
-from typing import TypeVar
+from typing import Self
 from typing import overload
 
 from musiclib import config
@@ -23,9 +23,6 @@
     import svg
 
 
-Self = TypeVar('Self', bound='NoteSet')
-
-
 class NoteSet(Cached, ReprSVGMixin):
     def __init__(self, notes: frozenset[Note]) -> None:
         if not isinstance(notes, frozenset):

src/musiclib/scale.py

@@ -4,7 +4,7 @@
 import pickle
 from typing import TYPE_CHECKING
 from typing import Any
-from typing import TypeVar
+from typing import Self
 
 if TYPE_CHECKING:
     from collections.abc import Iterator
@@ -20,8 +20,6 @@
 from musiclib.util.cache import Cached
 from musiclib.util.etc import setdefault_path
 
-Self = TypeVar('Self', bound='Scale')
-
 
 class Scale(Cached, ReprSVGMixin):
     def __init__(self, root: Note, intervalset: IntervalSet) -> None: