Add identifiers to ResourceWarnings from memory object streams

docs/versionhistory.rst

@@ -7,6 +7,8 @@ This library adheres to `Semantic Versioning 2.0 <http:https://semver.org/>`_.
 
 - Added support for the ``from_uri()``, ``full_match()``, ``parser`` methods/properties
  in ``anyio.Path``, newly added in Python 3.13
+- Changed the ``ResourceWarning`` from an unclosed memory object stream to include its
+ address for easier identification
 
 **4.4.0**
 

src/anyio/streams/memory.py

@@ -175,7 +175,7 @@ def __exit__(
  def __del__(self) -> None:
  if not self._closed:
  warnings.warn(
- f"Unclosed <{self.__class__.__name__}>",
+ f"Unclosed <{self.__class__.__name__} at {id(self):x}>",
  ResourceWarning,
  source=self,
  )
@@ -305,7 +305,7 @@ def __exit__(
  def __del__(self) -> None:
  if not self._closed:
  warnings.warn(
- f"Unclosed <{self.__class__.__name__}>",
+ f"Unclosed <{self.__class__.__name__} at {id(self):x}>",
  ResourceWarning,
  source=self,
  )

tests/streams/test_memory.py

@@ -469,11 +469,15 @@ async def test_deprecated_item_type_parameter() -> None:
 async def test_not_closed_warning() -> None:
  send, receive = create_memory_object_stream[int]()
 
- with pytest.warns(ResourceWarning, match="Unclosed <MemoryObjectSendStream>"):
+ with pytest.warns(
+ ResourceWarning, match="Unclosed <MemoryObjectSendStream at [0-9a-f]+>"
+ ):
  del send
  gc.collect()
 
- with pytest.warns(ResourceWarning, match="Unclosed <MemoryObjectReceiveStream>"):
+ with pytest.warns(
+ ResourceWarning, match="Unclosed <MemoryObjectReceiveStream at [0-9a-f]+>"
+ ):
  del receive
  gc.collect()