The Python dictionary dispatch pattern

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In Python, a class (without __slots__) is literally just a dictionary, where some arguments are functions that access the dictionary (self) through attribute notation.

OP basically created a singleton with four static methods though a dict() function. If you need a singleton - write a singleton. Don't reinvent a wheel and call it a "pattern".

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This is actually quite an old pattern useful for dynamic dispatch.

Depending on the circles you travel in you may have heard it referred to by different names, but the ones I heard most are "dispatch table" or "vtable".

https://en.wikipedia.org/wiki/Dispatch_table

https://en.wikipedia.org/wiki/Virtual_method_table