1 """Error types for dispatcher mechanism

     2 """

     3 

     4 class DispatcherError(Exception):

     5     """Base class for all Dispatcher errors"""

     6 class DispatcherKeyError(KeyError, DispatcherError):

     7     """Error raised when unknown (sender,signal) set specified"""

     8 class DispatcherTypeError(TypeError, DispatcherError):

     9     """Error raised when inappropriate signal-type specified (None)"""

    10