[Python-Dev] Semantics of int(), index() (original) (raw)
Chris Angelico rosuav at gmail.com
Thu Apr 4 17:01:53 CEST 2013
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On Fri, Apr 5, 2013 at 1:59 AM, Guido van Rossum <guido at python.org> wrote:
On Thu, Apr 4, 2013 at 7:47 AM, Chris Angelico <rosuav at gmail.com> wrote:
Is there any argument that I can pass to Foo() to get back a Bar()? Would anyone expect there to be one? Sure, I could override new to do stupid things, but in terms of logical expectations, I'd expect that Foo(x) will return a Foo object, not a Bar object. Why should int be any different? What have I missed here?
A class can define a new method that returns a different object. E.g. (python 3):
Right, I'm aware it's possible. But who would expect it of a class?
ChrisA
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