alt Hacker NewsPython discovers immutable data, and gets it wrong. Frozendict is a blunt instrument - instead of a mutable free-for-all, it just locks the data for the entire lifecycle. Brace for the wave of code littered with deep copies, proudly proclaiming how functional it all is.
If you want real immutable data structures, not a cheap imitation, check out pyrsistent.
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shadowgovt • yesterday at 3:12 PM
If your dicts are frozen, you shouldn't need to deep-copy. The point of immutability is that if you want a new frozendict based on another one, you just rebuild the indirection data structure up top and leave the values it references alone.
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How else would you "modify" immutable data other than by copying it?