<s> class AuthenticationError ( Exception ) : <EOL> def __init__ ( self , message = None ) : <EOL> self . message = message <EOL> def __str__ ( self ) : <EOL> return self . message <EOL> class GerritError ( Exception ) : <EOL> def __init__ ( self , message ) : <EOL> self . message = message <EOL> def __str__ ( self ) : <EOL> return self . message <EOL> class NotSignedInError ( GerritError ) : <EOL> pass <EOL> class UnknownAuthenticationMethodError ( Exception ) : <EOL> pass </s>
