Marcus Goldfish wrote:
> Here's a noodler I could use some help on: I need a class that can
> call a user-specified function with arbitrary (unknown) parameter
> lists. The trick, here, is that the user will dynamically specify the
> funciton to invoke, and each function may differ in the number of
> parameters passed during the call. For instance, suppose I define two
> dummy functions with different calling signatures:
>
> def foo1(a1, a2, a3):
> ...
>
> def foo2(a1):
> ...
>
> Then I seek a class, Caller
>
> class Caller(object):
> def execute(self, method, *parms):
> # some way to execute method
>
> That can be used in the following manner:
>
>
>>>c = Caller();
>>>c.execute("foo1", 8, 9, 10)
>>>c.execute("foo2", "me")
>
>
> Any tips on tackling this?
Something like this:
def execute(self, method, *parms):
fn = locals().get(method) or globals.get(method)
if fn:
fn(*parms)
Seems like there should be a better way of looking up method but I can't think
of it right now...if method is an instance method of Caller then you could use
fn = getattr(self, method)
(which will raise AttributeError if there is no such method)
Kent
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