bpo-44471: Change error type for bad objects in ExitStack.enter_context() (GH-26820)

A TypeError is now raised instead of an AttributeError in
ExitStack.enter_context() and AsyncExitStack.enter_async_context()
for objects which do not support the context manager or
asynchronous context manager protocols correspondingly.

1 files changed, 8 insertions, 0 deletions

diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index c9065be..7ac3856 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -515,6 +515,10 @@ Functions and classes provided:
       These context managers may suppress exceptions just as they normally
       would if used directly as part of a :keyword:`with` statement.
 
+      ... versionchanged:: 3.11
+          Raises :exc:`TypeError` instead of :exc:`AttributeError` if *cm*
+          is not a context manager.
+
    .. method:: push(exit)
 
       Adds a context manager's :meth:`__exit__` method to the callback stack.
@@ -585,6 +589,10 @@ Functions and classes provided:
       Similar to :meth:`enter_context` but expects an asynchronous context
       manager.
 
+      ... versionchanged:: 3.11
+          Raises :exc:`TypeError` instead of :exc:`AttributeError` if *cm*
+          is not an asynchronous context manager.
+
    .. method:: push_async_exit(exit)
 
       Similar to :meth:`push` but expects either an asynchronous context manager