输入一个整数，判断是否偶数

实现

#!/usr/bin/env python3
#-*- coding;utf-8 -*-
#True - x is even number.
#False - x isn't event number,so it is a odd number.
def isEven(x):
    return x%2==0
def main():
    x=eval(input())
    print(f"{x}是偶数" if isEven(x) else f"{x}不是偶数")
main()

输出

3
3不是偶数

Q.E.D.