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Code Listing by Steven Cummings

Code 1-2 of 2   






Ensure that a name exists in a target namespace. If it does not, make it available in the target namespace using the given definition. The target should be a namespace dictionary (presumably for a module, see the discussion below otherwise). The default target is __builtins__ (specificially, __builtins__.__dict__).



This is an dynamic dispatching approach inspired by C#-style events. The approach allows for the dispatch of an event to a series of chained methods through the use of a Dispatcher. The Dispatcher can be defined either as part of a class or merely...