frozendict v2.5.0

What's Changed

Breaking changes

• Removed frozendict.__deepcopy__. deepcopy() now always returns a copy, even if the frozendict is hashable.
• Pure py: | accepts only dict and frozendict, like the C Extension and dict.

Speed

• C Extension: freelists for frozendicts and keys make creating small frozendicts faster: the constructor, set() and delete().
• C Extension: frozendicts take less memory in some cases.
• Pure py: faster set, setdefault, delete and |.
• fd | {} and frozendict() | fd now return fd immediately.

Fixes

• set, setdefault, delete and | could return a frozendict not tracked by the GC, so its reference cycles were never collected.
• Pure py: deepcopy() of a recursive frozendict no longer raises RecursionError.
• Pure py: dict | frozendict now also works on Python 3.8 and earlier.
• fromkeys() with an empty iterable now returns the empty singleton.
• Fixed crashes, reference leaks and missing error checks in the C Extension. Also fixed from frozendict import *, the signature of set in the stub, and the silent fallback to pure py when the C Extension fails to load, which now emits a warning. Thanks to @devdanzin for the audit.
• Typing: fixed items, keys, values, __ror__ and setdefault(key).

by @Marco-Sulla in #120

Other Fixes

• Use built-in Self type in __init__.pyi when available by @adriengcql in #114
• Fix C extension build for unsupported Python versions by @jvulgan in #117
• Recursively freeze fallback object attributes by @muneikh in #118

New Contributors

• @adriengcql made their first contribution in #114
• @jvulgan made their first contribution in #117
• @muneikh made their first contribution in #118

Full Changelog: v2.4.7...v2.5.0