exception.py 文件源码

def __init__(self, message=None, **kwargs):
        self.kwargs = kwargs

        if 'code' not in self.kwargs:
            try:
                self.kwargs['code'] = self.code
            except AttributeError:
                pass

        for k, v in self.kwargs.items():
            if isinstance(v, Exception):
                self.kwargs[k] = six.text_type(v)

        if self._should_format(message):
            try:
                message = self.message % kwargs

            except Exception:
                exc_info = sys.exc_info()
                # kwargs doesn't match a variable in the message
                # log the issue and the kwargs
                LOG.exception(_LE('Exception in string format operation'))
                for name, value in kwargs.items():
                    LOG.error(_LE("%(name)s: %(value)s"),
                              {'name': name, 'value': value})
                if CONF.fatal_exception_format_errors:
                    six.reraise(*exc_info)
                # at least get the core message out if something happened
                message = self.message
        elif isinstance(message, Exception):
            message = six.text_type(message)

        # NOTE(luisg): We put the actual message in 'msg' so that we can access
        # it, because if we try to access the message via 'message' it will be
        # overshadowed by the class' message attribute
        self.msg = message
        super(VDIBrokerException, self).__init__(message)