带有错误代码和错误消息的自定义Python异常
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class AppError(Exception):
pass
class MissingInputError(AppError):
pass
class ValidationError(AppError):
pass
def validate(self):
\"\"\" Validate Input and save it \"\"\"
params = self.__params
if \'key\' in params:
self.__validateKey(escape(params[\'key\'][0]))
else:
raise MissingInputError
if \'svc\' in params:
self.__validateService(escape(params[\'svc\'][0]))
else:
raise MissingInputError
if \'dt\' in params:
self.__validateDate(escape(params[\'dt\'][0]))
else:
raise MissingInputError
def __validateMulti(self, m):
\"\"\" Validate Multiple Days Request\"\"\"
if m not in Input.__validDays:
raise ValidationError
self.__dCast = int(m)
__str__
__str__
class AppError(Exception): pass
class MissingInputError(AppError):
# define the error codes & messages here
em = {1101: \"Some error here. Please verify.\", \\
1102: \"Another here. Please verify.\", \\
1103: \"One more here. Please verify.\", \\
1104: \"That was idiotic. Please verify.\"}
try:
# do something here that calls
# raise MissingInputError(1101)
except MissingInputError, e
print \"%d: %s\" % (e.args[0], e.em[e.args[0]])
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笛驮型迸
类的快速示例：class ErrorWithCode(Exception): def __init__(self, code): self.code = code def __str__(self): return repr(self.code) try: raise ErrorWithCode(1000) except ErrorWithCode as e: print(\"Received error with code:\", e.code)，因此这里还有一个示例...class ErrorWithArgs(Exception): def __init__(self, *args): # *args is used to get a list of the parameters passed in self.args = [a for a in args] try: raise ErrorWithArgs(1, \"text\", \"some more text\") except ErrorWithArgs as e: print(\"%d: %s - %s\" % (e.args[0], e.args[1], e.args[2]))淘圃跺枯替
class CustomError(Exception): \"\"\" Custom Exception \"\"\" def __init__(self, error_code, message=\'\', *args, **kwargs): # Raise a separate exception in case the error code passed isn\'t specified in the ErrorCodes enum if not isinstance(error_code, ErrorCodes): msg = \'Error code passed in the error_code param must be of type {0}\' raise CustomError(ErrorCodes.ERR_INCORRECT_ERRCODE, msg, ErrorCodes.__class__.__name__) # Storing the error code on the exception object self.error_code = error_code # storing the traceback which provides useful information about where the exception occurred self.traceback = sys.exc_info() # Prefixing the error code to the exception message try: msg = \'[{0}] {1}\'.format(error_code.name, message.format(*args, **kwargs)) except (IndexError, KeyError): msg = \'[{0}] {1}\'.format(error_code.name, message) super().__init__(msg) # Error codes for all module exceptions @unique class ErrorCodes(Enum): ERR_INCORRECT_ERRCODE = auto() # error code passed is not specified in enum ErrorCodes ERR_SITUATION_1 = auto() # description of situation 1 ERR_SITUATION_2 = auto() # description of situation 2 ERR_SITUATION_3 = auto() # description of situation 3 ERR_SITUATION_4 = auto() # description of situation 4 ERR_SITUATION_5 = auto() # description of situation 5 ERR_SITUATION_6 = auto() # description of situation 6