Question

执行时的以下代码不会导致打印参数（即：不允许除以零）。它只提供内置的错误信息 - ZeroDivisionError。因此，当内置错误消息可用时，是否使用了用户定义的参数。

print "Enter the dividend"
dividend=input()
print "Enter the divisor"
divisor=input()

try:
    result=dividend/divisor
except "ZeroDivisonError",argument:
    print "Divide by Zero is not permitted \n ",argument # Argument not getting printed
else:   
    print "Result=%f" %(result)

Answer 1

制作您的例外通用作品：

dividend=int(input("Enter the dividend: "))
divisor=int(input("Enter the divisor: "))

try:
    result=dividend/divisor
except Exception,argument:
    print "Divide by Zero is not permitted \n ",str(argument) # Argument not getting printed
else:   
    print "Result=%f" %(result)

如果您想定义自己的例外，请按照以下方式：

# Define a class inherit from an exception type
class CustomError(Exception):
    def __init__(self, arg):
        # Set some exception infomation
        self.msg = arg

try:
    # Raise an exception with argument
    raise CustomError('This is a CustomError')
except CustomError, arg:
    # Catch the custom exception
    print 'Error: ', arg.msg

您可以在此处找到此模板：Proper way to define python exceptions

Answer 2

＆＃34; ZeroDivisonError＆＃34;的拼写是不正确的，而且它不应该在＆＃34;＆＃34;。正确的行：

    except ZeroDivisionError,argument:
    print "Divide by Zero is not permitted \n ",argument

用户定义并在异常中构建参数

2 个答案: