addition.py

def addition(a, b):
    return a + b
    
def addition_inf(*argv):
    res = 0
    for arg in argv:  
        res += arg
    return res

if __name__=="__main__": 
    assert addition(1, 2) == 3
    assert not addition(1, 2) == 2

    assert addition_inf(1, 1, 1) == 3
    assert not addition_inf(1, 1, 1) == 2

    assert addition_inf(1, 1, 1) == addition(1, 2)