List views should have a selectable pagination "page" length:
http://code.google.com/p/soc/issues/detail?id=59
Patch by: Chen Lunpeng and Todd Larsen
Review by: Augie Fackler
Review URL: http://codereviews.googleopensourceprograms.com/1201
"""Error types for dispatcher mechanism
"""
class DispatcherError(Exception):
"""Base class for all Dispatcher errors"""
class DispatcherKeyError(KeyError, DispatcherError):
"""Error raised when unknown (sender,signal) set specified"""
class DispatcherTypeError(TypeError, DispatcherError):
"""Error raised when inappropriate signal-type specified (None)"""