Dynamic class methods misunderstanding
Bill Mill
bill.mill at gmail.com
Fri Jan 28 12:04:05 EST 2005
On Fri, 28 Jan 2005 11:59:50 -0500, Hans Nowak <hans at zephyrfalcon.org> wrote:
> Bill Mill wrote:
>
> > On Fri, 28 Jan 2005 11:09:16 -0500, Hans Nowak <hans at zephyrfalcon.org> wrote:
> > <snip>
> >
> >>To add m as a new method to the *class*, do this:
> >>
> >> >>> class test:
> >>... def __init__(self, method):
> >>... self.__class__.method = method
> >>... self.method()
> >>...
> >> >>> def m(self): print self
> >>...
> >> >>> test(m)
> >><__main__.test instance at 0x0192ED78>
> >><__main__.test instance at 0x0192ED78>
> >
> >
> > When I run it, I only get one call to m, which is how I would expect
> > python to work; I assume the double printing here is a typo?
>
> Actually, no. I'm using the interactive interpreter, so doing test(m)
> results in two lines: the first one is printed by m, the second one is
> the __repr__ of the test instance that was created, displayed by the
> interpreter. Compare:
>
> >>> x = test(m)
> <__main__.test instance at 0x0192ED78>
> >>> x
> <__main__.test instance at 0x0192ED78>
>
d'oh; that's how I ran it. Thanks a lot.
> --
> Hans Nowak
> http://zephyrfalcon.org/
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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