a_chain_adding_function.py

"""
We want to create a function that will add numbers together when called in succession.

add(1)(2);
// returns 3
We also want to be able to continue to add numbers to our chain.

add(1)(2)(3); // 6
add(1)(2)(3)(4); // 10
add(1)(2)(3)(4)(5); // 15
and so on.

A single call should return the number passed in.

add(1); // 1
We should be able to store the returned values and reuse them.

var addTwo = add(2);
addTwo; // 2
addTwo + 5; // 7
addTwo(3); // 5
addTwo(3)(5); // 10
We can assume any number being passed in will be valid whole number.
"""


class add(int):
    def __call__(self, value):
        return add(self + value)