Pass a function as a variable with one input fixed

Question

Say I have a two dimensional function f(x,y) and another function G(function) that takes a function as an input. BUT, G only takes one dimensional functions as input and I\

Answer 1

The functools.partial function can be used to do this (note, it's not entirely clear where c comes from in your example code, so I've assumed it's some constant).

import functools

def f(x,y):
    return x+y

c = 3

G = functools.partial(f, c)
G(4)

I think this is more explicit than the lambda approaches suggested so far.

Edit: replacing the right most argument is not possible as we are dealing with positional arguments. Depending on the level of control available, you could introduce a wrapper which handles the switching:

import functools

def f(x,y):
    return x+y

def h(c,y):
    return f(y,c)

c = 3

G = functools.partial(h, c)
G(4)

But I think you start to sacrifice readability and maintainability at this point...