   import math
    x = int(input("Enter a value for x: "))
    y = int(input("Enter a value for y: "))
    if y == 1 or y == x:
        print(1)
    if y>x:
        print(0)

    else:
        a = math.factorial(x)
        b = math.factorial(y)
        div = (a//(b*(x-y)))
        print(div)  

Create bi_coef.py