関数とクラス

classes.py

class Stuffy(object):
    def __init__(self, s = None):
        self.buffer = s

    def eek(self):
        return self.buffer

if __name__ == '__main__':
    s1 = Stuffy(10)
    s2 = Stuffy(20)

    print s1.eek()
    print s2.eek()

functions.py

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

if __name__ == '__main__':
    print factorial(10)
    print factorial(20)