class RedisError(Exception): ... def __unicode__(self): ... class AuthenticationError(RedisError): ... class ConnectionError(RedisError): ... class TimeoutError(RedisError): ... class BusyLoadingError(ConnectionError): ... class InvalidResponse(RedisError): ... class ResponseError(RedisError): ... class DataError(RedisError): ... class PubSubError(RedisError): ... class WatchError(RedisError): ... class NoScriptError(ResponseError): ... class ExecAbortError(ResponseError): ... class ReadOnlyError(ResponseError): ... class LockError(RedisError, ValueError): ...