异常处理 / 自定义异常

exception_msg.py

class JobLookupError(KeyError):
    def __init__(self, job_id):
        super(KeyError, self).__init__(u'No job by the id of %s was found' % job_id)
        
raise JobLookupError(job_id)

exceptions.py

class HTTPException(Exception):
    code = None
    description = None
    
    def __init__(self, description=None, response=None):
        Exception.__init__(self)
        if description is not None:
            self.description = description
        self.response = response
        
class BadRequest(HTTPException):
    code = 400
    description = '...'
    
class ClientDisconnected(BadRequest):
    pass

类属性的使用方法
如果该类是可以继承的,且有默认的属性, 提出来做类属性 如 code 和 description

HTTP 各状态码的含义