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venv/lib/python3.9/site-packages/fontTools/misc/enumTools.py

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+"""Enum-related utilities, including backports for older Python versions."""
+
+from __future__ import annotations
+
+from enum import Enum
+
+
+__all__ = ["StrEnum"]
+
+# StrEnum is only available in Python 3.11+
+try:
+    from enum import StrEnum
+except ImportError:
+
+    class StrEnum(str, Enum):
+        """
+        Minimal backport of Python 3.11's StrEnum for older versions.
+
+        An Enum where all members are also strings.
+        """
+
+        def __str__(self) -> str:
+            return self.value