指定错误类型时如何打印异常？

Question

我试图显示一个用户友好的错误消息，同时也显示异常，但我似乎无法使它工作。你知道吗

我尝试了这些，但出现了无效的语法错误：

#First try:
except Exception as e, ValueError:
        print("\nThe program is unable to calculate the given equation. " +
            "Try Again!")
        print("\nError message " + e)
        continue

#Second try:
except ValueError, Exception as e:
        print("\nThe program is unable to calculate the given equation. " +
            "Try Again!")
        print("\nError message " + e)
        continue

如果有人能帮我解决这个问题就太好了。谢谢！你知道吗

Answer 1

您可以使用回溯：

import traceback

#First try:
except ValueError:
        print("\nThe program is unable to calculate the given equation. " +
            "Try Again!")
        print("\nError message " + traceback.format_exc())
        continue

#Second try:
except Exception as e:
        print("\nThe program is unable to calculate the given equation. " +
            "Try Again!")
        print("\nError message " + traceback.format_exc())
        continue