Question

Prior to construct an instance of class Foo, I would like to create an instance method object of a method defined in class Foo and assign it to a variable. I would then create an instance of class Foo, and execute the instance method object via the variable against the newly created instance. Is this doable? If so, how? Thanks.

Answer 1

I hope I understood correctly that you want something like this:

>>> class Foo(object):
...     def __init__(self, msg):
...         self.msg = msg
...     def speak(self):
...         print(self.msg)
...      
>>> tell_me = Foo.speak
>>> tell_me(Foo("hello!"))
hello!

Yes, this is possible. Foo.speak is an unbound method, which is a callable (function) that can be passed an instance as its first argument to obtain the same behavior that you’d get from a bound method such as Foo("hello").speak.