🐛 Fix Python3.11+ raises ModuleNotFoundError: No module named typing_extensions

Author: waketzheng

asyncer/_compat.py

@@ -1,12 +1,17 @@
 # AnyIO 4.1.0 renamed cancellable to abandon_on_cancel
 import importlib
 import importlib.metadata
+import sys
 from typing import Callable, TypeVar, Union
 
 import anyio
 import anyio.to_thread
 from anyio import CapacityLimiter
-from typing_extensions import TypeVarTuple, Unpack
+
+if sys.version_info >= (3, 11):
+    from typing import TypeVarTuple, Unpack
+else:
+    from typing_extensions import TypeVarTuple, Unpack
 
 ANYIO_VERSION = importlib.metadata.version("anyio")
 

asyncer/_main.py

@@ -135,7 +135,7 @@ async def do_work(name: str) -> str:
         async with asyncer.create_task_group() as task_group:
             result1 = task_group.soonify(do_work)(name="task 1")
             result2 = task_group.soonify(do_work)(name="task 2")
-            await anyio.sleep(0)
+            await anyio.lowlevel.checkpoint()
             if not result1.pending:
                 print(result1.value)
             if not result2.pending:

poetry.toml

@@ -32,7 +32,7 @@ classifiers = [
 ]
 dependencies = [
     "anyio >=3.4.0,<5.0",
-    "typing_extensions >=4.8.0; python_version < '3.10'"
+    "typing_extensions >=4.8.0; python_version < '3.11'"
 ]
 
 [project.urls]