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This is a fork of CPython that implement an immutable mapping usingHash array mapped trie (HAMT) for PEP 550.

Two files of interest: Objects/hamtobject.c and Objects/hamtobject.h.

To test the new datastructure use thehamt() builtin:

h = hamt()h.set('a', 'b')print(h.get('a'))

Onlyset() andget() methods are implemented.Read more about this in the PEP.