importing a method

[Antoon Pardon]

Op 2005-11-27, Flavio schreef <fccoelho at gmail.com>:
> hi,
>
> I have an object defined with a number of hardcoded methods.
>
> Class soandso:
>     def __init__(self):
>         self.this = 0
>         self.that = 1
>     def meth1(self):
>         ...
>     def meth2(self):
>         ...
>     def custom(self):
>         pass
>
> I want to allow the user to write a python module that declares a
> function so that myprogram can import it and attribute it to the custom
> method of the soandso object. So far so good, that is an easy thing to
> do in Python.
>
> import usermodule
> a=soandso()
> a.custom = usermodule.function
>
> But, what if the method had to access the self attributes (self.this
> and self.that) of the soandso object?
>
> Can it be done? and if so, what is the most Pythonic way of doing it?

You mean something like this:

>>> class Foo:
...   def __init__(self, v):
...     self.value = v
... 
>>> def show(self):
...   print self.value
... 
>>> import new
>>> f = Foo(17)
>>> f.show = new.instancemethod(show, f)
>>> f.show()
17

-- 
Antoon Pardon