bpo-37651: Document CancelledError is now a subclass of BaseException (GH-15950)
https://bugs.python.org/issue37651
Automerge-Triggered-By: @1st1
diff --git a/Doc/library/asyncio-exceptions.rst b/Doc/library/asyncio-exceptions.rst
index e49577a..b1e6ecf 100644
--- a/Doc/library/asyncio-exceptions.rst
+++ b/Doc/library/asyncio-exceptions.rst
@@ -25,26 +25,9 @@
when asyncio Tasks are cancelled. In almost all situations the
exception must be re-raised.
- .. important::
+ .. versionchanged:: 3.8
- This exception is a subclass of :exc:`Exception`, so it can be
- accidentally suppressed by an overly broad ``try..except`` block::
-
- try:
- await operation
- except Exception:
- # The cancellation is broken because the *except* block
- # suppresses the CancelledError exception.
- log.log('an error has occurred')
-
- Instead, the following pattern should be used::
-
- try:
- await operation
- except asyncio.CancelledError:
- raise
- except Exception:
- log.log('an error has occurred')
+ :exc:`CancelledError` is now a subclass of :class:`BaseException`.
.. exception:: InvalidStateError