Use typing_extensions to support <3.11

Author: simoncozens

python/afdko/otfautohint/glyphData.py

@@ -11,7 +11,8 @@
 from math import sqrt
 from collections import defaultdict
 from builtins import tuple as _tuple
-from typing import Any, List, Optional, Tuple, Union, Self
+from typing import Any, List, Optional, Tuple, Union
+from typing_extensions import Self
 from fontTools.config import Option
 
 # pytype: disable=import-error

python/afdko/otfautohint/hinter.py

@@ -23,8 +23,8 @@
     TypeVar,
     Union,
     Optional,
-    Self,
 )
+from typing_extensions import Self
 
 from fontTools.misc.bezierTools import solveCubic
 

python/afdko/otfautohint/hintstate.py

@@ -13,8 +13,19 @@
 from . import Number
 from .glyphData import feq, pathElement, stem
 from _weakref import ReferenceType
-from typing import Any, Dict, Iterable, List, Optional, Sequence, Set, Tuple, Type, Self, Protocol
-
+from typing import (
+    Any,
+    Dict,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Type,
+    Protocol,
+)
+from typing_extensions import Self
 
 log: logging.Logger = logging.getLogger(__name__)
 

requirements.txt

@@ -11,3 +11,4 @@ psautohint==2.4.0
 tqdm==4.66.1
 ufonormalizer==0.6.1
 ufoProcessor==1.9.0
+typing-extensions==4.8.0

setup.py

@@ -200,7 +200,8 @@ def main():
               'setuptools_scm',
               'scikit-build',
               'cmake',
-              'ninja'
+              'ninja',
+              'typing_extensions'
           ],
           tests_require=[
               'pytest',