On Fri, 06 Jun 2014 09:21:26 +1000, Chris Angelico wrote: > On Fri, Jun 6, 2014 at 9:02 AM, Sturla Molden <sturla.mol...@gmail.com> > wrote: >> You cannot spoof the type of an object in Python. > > Not without fiddling around. Python 3.4 on win32: [...] >>>> x = Foo() >>>> x.spam() > <__main__.Foo object at 0x0169AB10> spams >>>> x.__class__ = Bar >>>> x.spam() > <__main__.Bar object at 0x0169AB10> eats spam > > The thing has the same id (as shown in its repr), but has changed class.
That's not spoofing types. That is a language feature: within limits, instances can change their type. It has been around for a long, long time, back to Python 1.5 or older, and it has real-world use-cases: http://code.activestate.com/recipes/68429-ring-buffer/ -- Steven D'Aprano http://import-that.dreamwidth.org/ -- https://mail.python.org/mailman/listinfo/python-list
