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Project Description

An Ordered Set implementation in Cython. Based on Raymond Hettinger’s OrderedSet recipe.

Example:

>>> from orderedset import OrderedSet
>>> oset = OrderedSet([1, 2, 3])
>>> oset
OrderedSet([1, 2, 3])
>>> oset | [5, 4, 3, 2, 1]
OrderedSet([1, 2, 3, 5, 4])

Features

  • Works like a regular set, but remembers insertion order;
  • Is approximately 5 times faster than the pure Python implementation overall (and 5 times slower than set);
  • Compatible with Python 2.6 through 3.4.;
  • Supports the full set interface;
  • Supports some list methods, like index and __getitem__.
  • Supports set methods against iterables.

Changelog

2.0 - 2016-02-02

  • breaking change: All comparisons, other than eq, against other ordered sets are now performed unordered; i.e., they are treated as regular sets.
  • isorderedsubset and isorderedsuperset have been added to perform ordered comparisons against other sequences. Using these methods with unordered collections wield yield arbitrary (and depending on Python implementation, unstable) results.

1.2 - 2015-09-29

  • bugfix: Set operations only worked with iterables if the OrderedSet was on the left-hand side. They now work both ways.
  • bugfix: The order of an intersection was the right-hand side’s order. It is now fixed to be the left-hand side’s order.

1.1.2 - 2014-10-02

  • Make comparisons work with sets and lists, and not crash when compared with None.

1.1.1 - 2014-08-24

  • Add pickle/copy support to OrderedSet

1.1 - 2014-06-04

  • Make OrderedSets handle slicing in __getitem__().

1.0.2 - 2014-05-14

  • Add proper attribution and licenses.

1.0.1 - 2014-05-13

  • Don’t require Cython to build an sdist.

1.0 - 2014-05-11

  • First implementation.
Release History

Release History

2.0

This version

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1.2

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1.1.2

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1.1.1

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1.1

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1.0.2

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1.0.1

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1.0

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
orderedset-2.0.tar.gz (78.0 kB) Copy SHA256 Checksum SHA256 Source Feb 2, 2016

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