I have got a class similar to 

```
class C:
    def __init__(self, a):
        self.a = a
    def noParam(self):
        return self.a
    def withParam(self, b)
        return self.a + b
instC = C(5.)

```

I need to pass a method of a particular instance of a class as a parameter. Passing `instC.noParam` works fine, but how do I pass `instC.withParam` with `b` always equal to say `239`? Thanks.