[Python-Dev] type(obj) vs. obj.__class__

[Guido van Rossum]

Assigning __class__ is a precarious stunt (look at the implementation, it
requires lots of checks for various things like __slots__ and
implementation-specific special cases). The gesture that looks like
"overriding a method" is merely setting a new instance attribute that hides
the method, and quite tame in comparison.

-- 
--Guido van Rossum (python.org/~guido)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-dev/attachments/20151018/1705608f/attachment.html>