raise a new http error

gistfile1.txt

class Unprocessable(HTTPClientError):
    """
    subclass of :class:`~HTTPClientError`

    This indicates that the body or headers failed validity checks,
    preventing the server from being able to continue processing.

    code: 422, title: Bad Request
    """

    def __init__(self, error=None):
            
        self.code = 422
        self.title = 'Unprocessable entity'
        self.explanation = ('The server encounter when processing payload')
        self.message = error.message