封装一个数字比较函数，并比较输入数字:

#!/usr/bin/env python
# -*- coding:utf-8 -*-

def compare(num1, num2):
    if num1 > num2:
        print("%s大于%s" % (num1, num2))
    elif num2 > num1:
        print("%s大于%s" % (num2, num1))
    else:
        print("%s等于%s" % (num1, num2))

if __name__ == "__main__":
    numOne = input("请输入第一个数字:")
    numTwo = input("请输入第二个数字:")
    compare(numOne, numTwo)

Python2.x 与 Python3.x 均可用：

#!/usr/bin/env python
# -*- coding:utf-8 -*-

def compare(a,b):
    maxSum = max(a,b)
    minSum = min(a,b)
    print('%s比%s大'%(maxSum,minSum))
a = 10
b = 20
compare(a,b)