changing __call__ on demand

[Michael Hoffman]

Stefan Behnel wrote:
> 
> Thanks for the quick answer. I didn't know they were class-level 
> methods. Too bad. Guess I'll stick with indirection then.

Here is one way of doing that indirection I just thought of--have
the class __call__ attribute call on the instance __call__
attribute:

 >>> class MyClass(object):
...     def __init__(self, func):
...             self.__call__ = func
...     def __call__(self, *args, **keywds):
...             return self.__call__(*args, **keywds)
...
 >>> def f1(): return "foo"
...
 >>> def f2(x, y): return x+y
...
 >>> MyClass(f1)()
'foo'
 >>> MyClass(f2)(30, 12)
42

I still can't figure out whether this is elegant, or opaque and
to be avoided. <wink>
-- 
Michael Hoffman