6.4.4

Bug fixes

• Fixed a segmentation fault when calling :py:meth:multidict.MultiDict.setdefault with a single argument -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  #1160.

• Fixed a segmentation fault when attempting to directly instantiate view objects
  (multidict._ItemsView, multidict._KeysView, multidict._ValuesView) -- by :user:bdraco.

  View objects now raise a proper :exc:TypeError with the message "cannot create '...' instances directly"
  when direct instantiation is attempted.

  View objects should only be created through the proper methods: :py:meth:multidict.MultiDict.items,
  :py:meth:multidict.MultiDict.keys, and :py:meth:multidict.MultiDict.values.

  Related issues and pull requests on GitHub:
  #1164.

Miscellaneous internal changes

• :class:multidict.MultiDictProxy was refactored to rely only on
  :class:multidict.MultiDict public interface and don't touch any implementation
  details.

  Related issues and pull requests on GitHub:
  #1150.

• Multidict views were refactored to rely only on
  :class:multidict.MultiDict API and don't touch any implementation
  details.

  Related issues and pull requests on GitHub:
  #1152.

• Dropped internal _Impl class from pure Python implementation, both pure Python and C
  Extension follows the same design internally now.

  Related issues and pull requests on GitHub:
  #1153.

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