This function takes a set of coordinates on a grid and returns the number of discrete paths that can be taken from the origin.

algorithms.py

def count_paths(x, y):
    if x is 0 and y is 0:
        return 1
    else:
        a = 0 if y is 0 else count_paths(x, y-1)
        b = 0 if x is 0 else count_paths(x-1, y)
        return a + b

destination = (5, 3)

# 56
print(count_paths(*destination))