Calling a class instance like a function

[Uberman]

I'm wondering if there's a way to invoke a "function" operator on a Python
class instance.  For example, given a class instance:

	myClass = MyClass()

I want to call that instance like a function, with an argument value:

	myClass(5.0)

I can override the "()" operator in C++, so I'm wondering if there's a way to
do it in Python as well.

Thanks!