# `frozenset`

TODO: ADD MORE DETAIL

See the Python documentation entries for the [`set`][docs-set] collection, the [immutable][set type][docs-set-type]; essentially a [hash map][hash-map] in which only the key is relevant, and which disallows [mutation][mutation] of keys after initialization.

[immutable]: https://github.com/exercism/v3/blob/main/reference/concepts/immutability.md
[mutation]: https://github.com/exercism/v3/blob/main/reference/concepts/mutation.md
[hash-map]: https://github.com/exercism/v3/blob/main/reference/types/hash_map.md
[docs-frozenset]: https://docs.python.org/3/library/stdtypes.html#frozenset
[docs-frozenset-type]: https://docs.python.org/3/library/stdtypes.html#types-set
