Metadata-Version: 1.1
Name: odict
Version: 1.8.1
Summary: Ordered Dictionary.
Home-page: https://github.com/conestack/odict
Author: Node Contributors
Author-email: dev@conestack.org
License: Python Software Foundation License
Description: .. image:: https://img.shields.io/pypi/v/odict.svg
            :target: https://pypi.python.org/pypi/odict
            :alt: Latest PyPI version
        
        .. image:: https://img.shields.io/pypi/dm/odict.svg
            :target: https://pypi.python.org/pypi/odict
            :alt: Number of PyPI downloads
        
        .. image:: https://github.com/conestack/odict/actions/workflows/test.yaml/badge.svg
            :target: https://github.com/conestack/odict/actions/workflows/test.yaml
            :alt: Test odict
        
        
        odict
        =====
        
        Dictionary in which the *insertion* order of items is preserved (using an
        internal double linked list). In this implementation replacing an existing
        item keeps it at its original position.
        
        Internal representation: values of the dict.
        
        .. code-block:: python
        
            [pred_key, val, succ_key]
        
        The sequence of elements uses as a double linked list. The ``links`` are dict
        keys. ``self.lh`` and ``self.lt`` are the keys of first and last element
        inserted in the odict.
        
        
        Motivation
        ----------
        
        When this package was created, ``collections.OrderedDict`` not existed yet.
        
        Another problem is that ``dict`` cannot always be inherited from in conjunction
        with other base classes. This may result in instance layout conflicts or other
        errors. So ``odict`` is written in a way that let you alter the dictionary
        base implementation.
        
        
        Usage
        -----
        
        Import and create ordered dictionary.
        
        .. code-block:: python
        
            from odict import odict
            od = odict()
        
        
        Custom odict
        ------------
        
        It is possible to use ``_odict`` base class to implement an ordered dict not
        inheriting from ``dict`` type. This is useful i.e. when persisting to ZODB.
        
        Inheriting from ``dict`` and ``Persistent`` at the same time fails. Also,
        using a regular ``list`` for the internal double linked list representation
        causes problems, so we define a custom class for it as well.
        
        .. code-block:: python
        
            from persistent.dict import PersistentDict
            from persistent.list import PersistentList
        
            class podict(_odict, PersistentDict):
        
                def _dict_impl(self):
                    return PersistentDict
        
                def _list_factory(self):
                    return PersistentList
        
        
        Python < 3.7
        ------------
        
        In Python < 3.7 casting to dict will fail. The reason for this can be found
        `here <http://bugs.python.org/issue1615701>`_. The ``__init__`` function of
        dict checks whether arg is subclass of ``dict``, and ignores overwritten
        ``__getitem__`` & co if so. This was fixed and later reverted due to
        behavioural problems with pickle:
        
        .. code-block:: pycon
        
            >>> dict(odict([(1, 1)]))
            {1: [nil, 1, nil]}
        
        Use one of the following ways for type conversion.
        
        .. code-block:: pycon
        
            >>> dict(odict([(1, 1)]).items())
            {1: 1}
        
            >>> odict([(1, 1)]).as_dict()
            {1: 1}
        
        
        Misc
        ----
        
        In a C reimplementation of this data structure, things could be simplified
        (and speed up) a lot if given a value you can at the same time find its key.
        With that, you can use normal C pointers.
        
        
        Python Versions
        ---------------
        
        - Python 2.7, 3.7+
        
        - Probably works with other/older versions
        
        
        Contributors
        ============
        
        - bearophile (Original Author)
        
        - Robert Niederreiter (Author)
        
        - Georg Bernhard
        
        - Florian Friesdorf
        
        - Jens Klein
        
        under the `Python Software Foundation License <http://www.opensource.org/licenses/PythonSoftFoundation.php>`_.
        
        
        Changes
        =======
        
        1.8.1 (2022-03-17)
        ------------------
        
        - Do not run test suites for Python 2.6 and Python < 3.7 any more. No changes
          to the implementation have been made.
          [rnix]
        
        - Package housekeeping.
          [rnix]
        
        
        1.8.0
        -----
        
        - Add ``next_key`` and ``prev_key`` functions.
          [rnix]
        
        - Add ``first_key`` and ``last_key`` properties.
          [rnix]
        
        - Add ``_list_factory`` on ``_odict`` base class. Can be used to alter
          the list implementation used for internal value triples.
          [rnix]
        
        
        1.7.0
        -----
        
        - Add ``swap``, ``insertbefore``, ``insertafter``, ``insertfirst`` and
          ``insertlast`` functions to ``odict``.
          [rnix]
        
        
        1.6.2
        -----
        
        - Use class name instead of 'odict()' in ``__repr__``.
          [rnix]
        
        
        1.6.1
        -----
        
        - pypi masness.
          [rnix]
        
        
        1.6.0
        -----
        
        - Compatible with Python 3 and pypy.
          [rnix]
        
        
        1.5.2
        -----
        
        - Fix permission problem in 1.5.1 release, some files were only rw by user.
          [jensens, 2016-11-25]
        
        
        1.5.1
        -----
        
        - Implement ``__copy__`` and ``__deepcopy__`` in order to work with Python 2.7.
          [rnix, 2012-10-15]
        
        - Use ``try/except`` instead of ``in`` in ``__contains__``.
          [rnix, 2012-10-15]
        
        
        1.5.0
        -----
        
        - Implement ``alter_key``.
          [rnix, 2012-05-18]
        
        
        1.4.4
        -----
        
        - Remove unused error variable.
          [rnix, 2011-11-28]
        
        - Add note on why to check with ``==`` and ``!=`` against ``_nil``.
          [rnix, 2011-11-28]
        
        
        1.4.3
        -----
        
        - Get rid of annoying warning about "global" usage in ``bench.py``.
          [jensens, 2011-09-20]
        
        
        1.4.2
        -----
        
        - More ``copy`` testing.
          [rnix, 2010-12-18]
        
        - Add ``has_key`` to odict.
          [rnix, 2010-12-18]
        
        
        1.4.1
        -----
        
        - Fix release, README.rst was missing, added MANIFEST.in file to include it.
          [jensens, 2010-11-29]
        
        
        1.4.0
        -----
        
        - Full test coverage.
          [chaoflow, rnix, 2010-08-17]
        
        - Code cleanup and optimizing.
          [chaoflow, rnix, 2010-08-17]
        
        
        1.3.2
        -----
        
        - Access ``dict`` API providing class via function ``_dict_impl()`` and
          provide odict logic as abstract base class ``_odict``.
          [rnix, 2010-07-08]
        
        
        1.3.1
        -----
        
        - Add test for bool evaluation.
          [rnix, 2010-04-21]
        
        
        1.3.0
        -----
        
        - Fix access to ``odict.lt`` and ``odict.lh`` properties. Now it's possible
          to overwrite ``__setattr__`` and ``__getattr__`` on ``odict`` subclass
          without hassle.
          [rnix, 2010-04-06]
        
        - Add ``sort`` function to odict.
          [rnix, 2010-03-03]
        
        
        1.2.6
        -----
        
        - Make ``odict`` serialize and deserialize properly.
          [gogo, 2010-01-12]
        
        
        1.2.5
        -----
        
        - Add ``as_dict`` function. Supports type conto ordinary ``dict``.
          [rnix, 2009-12-19]
        
        - Add benchmark script.
          [rnix, 2009-12-19]
        
        
        1.2.4
        -----
        
        - Do not check for ``key in self`` on ``__delitem__``, ``KeyError`` is raised
          properly anyway. Huge Speedup!
          [rnix, jensens, 2009-12-18]
        
        
        1.2.3
        -----
        
        - Move tests to seperate file and make egg testable with
          ``python setup.py test``.
          [rnix, 2009-12-07]
        
        - improve ``lt`` and ``lh`` properties to make ``odict`` work with
          ``copy.deepcopy``.
          [rnix, 2009-12-07]
        
        
        1.2.2
        -----
        
        - Use try/except instead of ``__iter__`` in ``__setitem__`` to determine if
          value was already set.
          [rnix, 2009-07-17]
        
        
        1.2.1
        -----
        
        - Add missing ``__len__`` and ``__contains__`` functions.
          [rnix, 2009-03-17]
        
        
        1.2.0
        -----
        
        - Eggified
          [rnix, 2009-03-17]
        
        
        < 1.2
        -----
        
        - http://code.activestate.com/recipes/498195/
          [bearophile, 2006-10-12]
        
          
        
        
        License
        =======
        
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Keywords: odict dict ordered dictionary mapping collection tree
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: License :: OSI Approved :: Python Software Foundation License
Classifier: Operating System :: OS Independent
Classifier: Topic :: Software Development
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
