Dynamically bind method to class instance in python

Question

Let\'s say that I have a class defined in moduleA.py which I want to add a method to, using some sort of loader method that takes a the name of a second module

Answer 1

Since meth2() is a function, it is a descriptor and you can bind it by calling the __get__() method.

def meth2(self):
    return self.a + self.b

class ClassA(object):
    def __init__(self,config):
        super(ClassA, self).__init__()
        self.a = 1
        self.b = 2
        self.meth1 = config.__get__(self, ClassA)

c = ClassA(meth2)
print c.meth1() #correctly prints 3