bpo-42669: Document that `except` rejects nested tuples (GH-23822)
In Python 2, it was possible to use `except` with a nested tuple, and occasionally natural. For example, `zope.formlib.interfaces.InputErrors` is a tuple of several exception classes, and one might reasonably think to do something like this:
try:
self.getInputValue()
return True
except (InputErrors, SomethingElse):
return False
As of Python 3.0, this raises `TypeError: catching classes that do not inherit from BaseException is not allowed` instead: one must instead either break it up into multiple `except` clauses or flatten the tuple. However, the reference documentation was never updated to match this new restriction. Make it clear that the definition is no longer recursive.
Automerge-Triggered-By: GH:ericvsmithdiff --git a/Doc/reference/compound_stmts.rst b/Doc/reference/compound_stmts.rst
index a55aacc..8da74c7 100644
--- a/Doc/reference/compound_stmts.rst
+++ b/Doc/reference/compound_stmts.rst
@@ -254,7 +254,8 @@
expression, that expression is evaluated, and the clause matches the exception
if the resulting object is "compatible" with the exception. An object is
compatible with an exception if it is the class or a base class of the exception
-object or a tuple containing an item compatible with the exception.
+object, or a tuple containing an item that is the class or a base class of
+the exception object.
If no except clause matches the exception, the search for an exception handler
continues in the surrounding code and on the invocation stack. [#]_
diff --git a/Misc/ACKS b/Misc/ACKS
index 381aed1..80e51f9 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1849,6 +1849,7 @@
Barry Warsaw
Steve Waterbury
Bob Watson
+Colin Watson
David Watson
Aaron Watters
Henrik Weber