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To be honest, for me it looks as very strange pattern… If one wants to have static container with functions, there is Enums or classes.
With classes you needs getattr in python to achieve the same. This is cleaner for simple mappings
It’s most useful when you’re using some data you already have as the dictionary key. A usecase i had for this was a binary file parser with 10 types of event markers. It was originally coded with if/elif, but performance was a pretty big consideration. Using the event markers as keys to a dictionary dispatch improved performance by about 15% and made the code significantly more readable.
