Python- find a bug (error) ways and means to resolve

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bug information to see how the message

1, line 2 on behalf of the bug appears in the second line, so when we Debug can preferentially start checking from the second line
2, ^ position represents bug occurred here that position is the end of the second row
3, this line I wrote the wrong type, SyntaxError refers to the grammatical errors

Several handling of the bug

bug1: careless

bug2: knowledge unskilled

bug3: code logic is not clear

bug4: Passive out of the pit (here we use exception handling (try ... except ...))

#当有多个异常，我们可以这样写（将两个（或多个）异常放在一起，只要触发其中一个，就执行所包含的代码。）
except(ZeroDivisionError,ValueError):
         #print('你的输入有误，请重新输入！')

#常规错误的基类，假设不想提供很精细的提示，可以用这个语句响应常规错误
except Exception:
        print('你的输入有误，请重新输入！')