Fixed iterdir making blocking call in Python 3.13 (#874)

Fixes #873. --------- Co-authored-by: Alex Grönholm <[email protected]>
agronholm · Feb 21, 2025 · 38885f9 · 38885f9
1 parent 8bad9c0
commit 38885f9
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diff --git a/docs/versionhistory.rst b/docs/versionhistory.rst
@@ -13,6 +13,9 @@ This library adheres to `Semantic Versioning 2.0 <http://semver.org/>`_.
   nesting on asyncio due to exception chaining when raising ``ExceptionGroups``
   in ``TaskGroup.__aexit__``
   (`#863 <https://github.com/agronholm/anyio/issues/863>`_; PR by @tapetersen)
+- Fixed ``anyio.Path.iterdir()`` making a blocking call in Python 3.13
+  (`#873 <https://github.com/agronholm/anyio/issues/873>`_; PR by @cbornet and
+  @agronholm)
 
 **4.8.0**
 

diff --git a/src/anyio/_core/_fileio.py b/src/anyio/_core/_fileio.py
@@ -544,9 +544,14 @@ async def is_socket(self) -> bool:
     async def is_symlink(self) -> bool:
         return await to_thread.run_sync(self._path.is_symlink, abandon_on_cancel=True)
 
-    def iterdir(self) -> AsyncIterator[Path]:
-        gen = self._path.iterdir()
-        return _PathIterator(gen)
+    async def iterdir(self) -> AsyncIterator[Path]:
+        gen = (
+            self._path.iterdir()
+            if sys.version_info < (3, 13)
+            else await to_thread.run_sync(self._path.iterdir, abandon_on_cancel=True)
+        )
+        async for path in _PathIterator(gen):
+            yield path
 
     def joinpath(self, *args: str | PathLike[str]) -> Path:
         return Path(self._path.joinpath(*args))