fix: update TypeAlias import for compatibility with Python 3.9

pwwang · pwwang · commit 546b57cf6e18 · 2025-06-20T10:56:25.000-07:00
diff --git a/poetry.lock b/poetry.lock
diff --git a/pyproject.toml b/pyproject.toml
@@ -20,6 +20,7 @@ python = "^3.8"
 executing = "^2.1"
 asttokens = { version = "3.*", optional = true }
 pure_eval = { version = "0.*", optional = true }
+typing_extensions = { version = "^4.13", markers = "python_version < '3.10'" }
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8"
diff --git a/varname/utils.py b/varname/utils.py
@@ -18,7 +18,12 @@
 from pathlib import Path
 from functools import lru_cache, singledispatch
 from types import ModuleType, FunctionType, CodeType, FrameType
-from typing import Tuple, Union, List, Mapping, Callable, Dict, TypeAlias
+from typing import Tuple, Union, List, Mapping, Callable, Dict
+
+if sys.version_info < (3, 10):
+    from typing_extensions import TypeAlias  # pragma: no cover
+else:
+    from typing import TypeAlias
 
 from executing import Source
 
