Python bindings to the Rust rpds crate.
What's here is quite minimal (in transparency, it was written initially to support replacing pyrsistent in the referencing library).
If you see something missing (which is very likely), a PR is definitely welcome to add it.
Methods in general are named similarly to their rpds counterparts (rather than pyrsistent's conventions, though probably a full drop-in pyrsistent-compatible wrapper module is a good addition at some point).
>>> from rpds import HashTrieMap, HashTrieSet, List
>>> m = HashTrieMap({"foo": "bar", "baz": "quux"})
>>> m.insert("spam", 37) == HashTrieMap({"foo": "bar", "baz": "quux", "spam": 37})
True
>>> m.remove("foo") == HashTrieMap({"baz": "quux"})
True
>>> s = HashTrieSet({"foo", "bar", "baz", "quux"})
>>> s.insert("spam") == HashTrieSet({"foo", "bar", "baz", "quux", "spam"})
True
>>> s.remove("foo") == HashTrieSet({"bar", "baz", "quux"})
True
>>> L = List([1, 3, 5])
>>> L.push_front(-1) == List([-1, 1, 3, 5])
True
>>> L.rest == List([3, 5])
True