Experimental dictionary support for counts #647
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The idea is to use a custom PyTree class that is injected into the JAXPR when we are tracing the tape. The PyTree node will remain an array tuple for as long as we tracing, and once concrete values are available it unflattens into a Python dictionary.
Benefits:
Downsides:
The downside is especially problementic from a UI perspective. A full resolution might be to always present the return type of qml.counts as a dictionary, but this presents a few challenges:
Another solution might involve modifying the proposed class into a user-facing data type. A type that consists of two numeric arrays but which offers a dictionary like interface:
__getitem__
dict
if concrete