multidict 6.3.0

on Python PyPI

Bug fixes

• Set operations for KeysView and ItemsView of case-insensitive multidicts and their proxies are processed in case-insensitive manner.

  Related issues and pull requests on GitHub:
  #965.

• Rewrote :class:multidict.CIMultiDict and it proxy to always return
  :class:multidict.istr keys. istr is derived from :class:str,
  thus the change is backward compatible.

  The performance boost is about 15% for some operations for C Extension,
  pure Python implementation have got a visible (15% - 230%) speedup as well.

  Related issues and pull requests on GitHub:
  #1097.

• Fixed a crash when extending a multidict from multidict proxy if C Extensions were used.

  Related issues and pull requests on GitHub:
  #1100.

Features

• Implemented a custom parser for METH_FASTCALL | METH_KEYWORDS protocol
  -- by :user:asvetlov.

  The patch re-enables fast call protocol in the :py:mod:multidict C Extension.

  Speedup is about 25%-30% for the library benchmarks for Python 3.12+.

  Related issues and pull requests on GitHub:
  #1070.

• The C-extension no longer pre-allocates a Python exception object in
  lookup-related methods of :py:class:~multidict.MultiDict when the
  passed-in key is not found but default value is provided.

  Namely, this affects :py:meth:MultiDict.getone() <multidict.MultiDict.getone>, :py:meth:MultiDict.getall() <multidict.MultiDict.getall>, :py:meth:MultiDict.get() <multidict.MultiDict.get>, :py:meth:MultiDict.pop() <multidict.MultiDict.pop>, :py:meth:MultiDict.popone() <multidict.MultiDict.popone>, and :py:meth:MultiDict.popall() <multidict.MultiDict.popall>.

  Additionally, the :py:class:~multidict.MultiDict comparison with
  regular :py:class:dict\ ionaries is now about 60% faster
  on Python 3.13+ in the fallback-to-default case.

  Related issues and pull requests on GitHub:
  #1078.

• Implemented __repr__() for C Extension classes in C.

  The speedup is about 2.5 times.

  Related issues and pull requests on GitHub:
  #1081.

• Made C version of :class:multidict.istr pickleable.

  Related issues and pull requests on GitHub:
  #1098.

• Optimized multidict creation and extending / updating if C Extensions are used.

  The speedup is between 25% and 70% depending on the usage scenario.

  Related issues and pull requests on GitHub:
  #1101.

• :meth:multidict.MultiDict.popitem is changed to remove
  the latest entry instead of the first.

  It gives O(1) amortized complexity.

  The standard :meth:dict.popitem removes the last entry also.

  Related issues and pull requests on GitHub:
  #1105.

Contributor-facing changes

• Started running benchmarks for the pure Python implementation in addition to the C implementation -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #1092.

• The the project-wide Codecov_ metric is no longer reported
  via GitHub Checks API. The combined value is not very useful
  because one of the sources (MyPy) cannot reach 100% with the
  current state of the ecosystem. We may want to reconsider in
  the future. Instead, we now have two separate
  “runtime coverage” metrics for library code and tests.
  They are to be kept at 100% at all times.
  And the “type coverage” metric will remain advisory, at a
  lower threshold.

  The default patch metric check is renamed to “runtime”
  to better reflect its semantics. This one will also require
  100% coverage.
  Another “typing” patch coverage metric is now reported
  alongside it. It's considered advisory, just like its
  project counterpart.

  When looking at Codecov_, one will likely want to look at
  MyPy and pytest flags separately. It is usually best to
  avoid looking at the PR pages that sometimes display
  combined coverage incorrectly.

  The change additionally disables the deprecated GitHub
  Annotations integration in Codecov_.

  Finally, the badge coloring range now starts at 100%.

  .. image:: https://codecov.io/gh/aio-libs/multidict/branch/master/graph/badge.svg?flag=pytest
  :target: https://codecov.io/gh/aio-libs/multidict?flags[]=pytest
  :alt: Coverage metrics

  -- by :user:webknjaz

  Related issues and pull requests on GitHub:
  #1093.

Miscellaneous internal changes

• Synchronized :file:pythoncapi_compat.h with the latest available version.

  Related issues and pull requests on GitHub:
  #1063.

• Moved registering ABCs for C Extension classes from C to Python.

  Related issues and pull requests on GitHub:
  #1083.

• Refactored the internal pair_list implementation.

  Related issues and pull requests on GitHub:
  #1084.

• Implemented views comparison and disjoints in C instead of Python helpers.

  The performance boost is about 40%.

  Related issues and pull requests on GitHub:
  #1096.