<filename>main.py
def adder(a, b):
    return a + b

def subber(a, b):
    return a - b

if __name__ == "__main__":
    print(adder(1, 2))

<filename>main.py
def adder(a, b):
    return a + b

def subber(a, b):
    return a - b

if __name__ == "__main__":
    print(adder(1, 2))
