Question

我在python 3.5中使用此代码作为＆＃39;二次公式＆＃39;;

def quad(a,b,c):
    d = (b**2) - (4*a*c)
    num1 = (-b+math.sqrt(d))/(2*a)
    num2 = (-b-math.sqrt(d))/(2*a)
    print  ("Your solutions are", num1, "and", num2)

代码工作正常，但是当num1和num2的值显示为＆＃34; ValueError时，有没有办法让我添加一个显示的打印功能（＆＃34; Math Error＆＃34;）数学域错误＆＃34;

我在找这样的东西......

if num1 or num2 = ValueError: # I can't figure out how to 'word' this
    print ("Math Error")

Answer 1

只使用普通的普通异常处理程序

import sys

def quad(a,b,c):
    try:
        d = (b**2) - (4*a*c)
        num1 = (-b+math.sqrt(d))/(2*a)
        num2 = (-b-math.sqrt(d))/(2*a)
        print  ("Your solutions are", num1, "and", num2)
    except ValueError as e:
        print("Math error", e, file=sys.stderr)

有没有办法为ValueError打印一些东西？

1 个答案: