Skip to content
Permalink
Browse files

bpo-37651: Document CancelledError is now a subclass of BaseException (

…GH-15950)

https://bugs.python.org/issue37651

Automerge-Triggered-By: @1st1
(cherry picked from commit 7b69069)

Co-authored-by: Xtreak <tir.karthi@gmail.com>
  • Loading branch information...
miss-islington and tirkarthi committed Sep 11, 2019
1 parent aa52717 commit e784bb7c6b2a52e80d7c03cb85e5faab11a1ccbd
Showing with 2 additions and 19 deletions.
  1. +2 −19 Doc/library/asyncio-exceptions.rst
@@ -25,26 +25,9 @@ Exceptions
when asyncio Tasks are cancelled. In almost all situations the when asyncio Tasks are cancelled. In almost all situations the
exception must be re-raised. 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: :exc:`CancelledError` is now a subclass of :class:`BaseException`.
await operation
except asyncio.CancelledError:
raise
except Exception:
log.log('an error has occurred')




.. exception:: InvalidStateError .. exception:: InvalidStateError

0 comments on commit e784bb7

Please sign in to comment.
You can’t perform that action at this time.