fix UFOFormatVersion tuple's __str__ in python 3.11

python 3.11 doesn't like when a mixin overrides a dunder method like __str__, for some reasons it keep using Enum.__str__, see #2655
fonttools · Jul 6, 2022 · 5ca5791 · 5ca5791 · justvanrossum · Jul 6, 2022
1 parent ce38db6
commit 5ca5791
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diff --git a/Lib/fontTools/ufoLib/__init__.py b/Lib/fontTools/ufoLib/__init__.py
@@ -98,6 +98,11 @@ class UFOFormatVersion(tuple, _VersionTupleEnumMixin, enum.Enum):
 	FORMAT_2_0 = (2, 0)
 	FORMAT_3_0 = (3, 0)
 
+# python 3.11 doesn't like when a mixin overrides a dunder method like __str__
+# for some reasons it keep using Enum.__str__, see
+# https://github.com/fonttools/fonttools/pull/2655
+UFOFormatVersion.__str__ = _VersionTupleEnumMixin.__str__
+
 
 class UFOFileStructure(enum.Enum):
 	ZIP = "zip"

diff --git a/Lib/fontTools/ufoLib/glifLib.py b/Lib/fontTools/ufoLib/glifLib.py
@@ -79,6 +79,9 @@ def supported_versions(cls, ufoFormatVersion=None):
 			versions.add(cls.FORMAT_2_0)
 		return frozenset(versions)
 
+# workaround for py3.11, see https://github.com/fonttools/fonttools/pull/2655
+GLIFFormatVersion.__str__ = _VersionTupleEnumMixin.__str__
+
 
 # ------------
 # Simple Glyph