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Mon May 11 09:40:53 CEST 2015 · https://mail.python.org/pipermail/python-dev/2015-May/139945.html

* Mark Rosenblitt-Janssen <dreamingforward at gmail.com> [2015-05-10 11:34:52 -0500]:
> Here's something that might be wrong in Python (tried on v2.7):
> 
> >>> class int(str): pass
> 
> >>> int(3)
> '3'

What's so odd about this? "class int" is an assignment to "int", i.e.
what you're doing here is basically:

int = str
int(3)  # really str(3)

* Mark Rosenblitt-Janssen <dreamingforward at gmail.com> [2015-05-10 19:14:18 -0500]:
> In case the example given at the start of the thread wasn't
> interesting enough, it also works in the other direction:
> 
> >>> class str(int):  pass
> 
> >>> str('2')
> 2  #<----- an integer!!!

Same thing. You're shadowing the builtin.

Florian

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