三元运算符：{表达式为真的返回值} if {表达式} else {表达式为假的返回值}

    1. def small(a, b, c):
    2.     return a if (a < b and a < c)else (b if (b < a and b < c) else c)
    4. print(small(10, 32, 3))
    5. ------------------------
    6. #3
    8. info = [x**2 if (x > 5) else x**4 for x in range(1, 10)]
    9. print(info)
    10. --------------------------
    11. [1, 16, 81, 256, 625, 36, 49, 64, 81]