This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (
Help us improve Python packaging - Donate today!

Red/black trees in C++ for Python

Project Description

Copyright (c) 2015 Will Roberts <>

Licensed under the MIT License (see LICENSE.rst for details).

Cython interface to red-black trees implemented in C++.

Red-black trees are a kind of self-balancing binary tree. They maintain their entries in sorted order and have O(log n) for insertion, lookup, and deletion. You can read more about red-black trees and see animations of insertion, lookup, and deletion.

This package provides dictionary and set objects based on red-black-trees; these can be used as drop-in replacements for the built-in dict and set types, except that they maintain their contents in sorted order.

Dictionary (rbdict):

>>> import pyredblack
>>> d = pyredblack.rbdict(Germany = 'Berlin',
                          Hungary = 'Budapest',
                          Ireland = 'Dublin',
                          Portugal = 'Lisbon',
                          Cyprus = 'Nicosia',
                          Greenland = 'Nuuk',
                          Iceland = 'Reykjavik',
                          Macedonia = 'Skopje',
                          Bulgaria = 'Sofia',
                          Sweden = 'Stockholm')
>>> len(d)
>>> d['Ireland']
>>> d.keys()
['Bulgaria', 'Cyprus', 'Germany', 'Greenland', 'Hungary',
 'Iceland', 'Ireland', 'Macedonia', 'Portugal', 'Sweden']
>>> d.values()
['Sofia', 'Nicosia', 'Berlin', 'Nuuk', 'Budapest',
 'Reykjavik', 'Dublin', 'Skopje', 'Lisbon', 'Stockholm']
>>> d.popitem()
('Bulgaria', 'Sofia')
>>> d.popitem()
('Cyprus', 'Nicosia')
>>> d.popitem()
('Germany', 'Berlin')

Set (rbset):

>>> fruit = pyredblack.rbset(['apple', 'orange', 'apple', 'pear',
                              'orange', 'banana'])
>>> 'orange' in fruit
>>> 'crabgrass' in fruit
>>> a = pyredblack.rbset('abracadabra')
>>> b = pyredblack.rbset('alacazam')
>>> list(a)
['a', 'b', 'c', 'd', 'r']
>>> list(a - b)
['b', 'd', 'r']
>>> list(a | b)
['a', 'b', 'c', 'd', 'l', 'm', 'r', 'z']
>>> list(a & b)
['a', 'c']
>>> list(a ^ b)
['b', 'd', 'l', 'm', 'r', 'z']
>>> a.pop()
>>> a.pop()
>>> a.pop()


  • Python 2.7, Python 3.2+
  • Cython (and a C++ compiler)


  • implement slicing on dictionaries
Release History

Release History

This version
History Node


History Node


Download Files

Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
pyredblack-0.1.1-cp27-none-macosx_10_11_x86_64.whl (84.0 kB) Copy SHA256 Checksum SHA256 cp27 Wheel Nov 10, 2016
pyredblack-0.1.1-cp34-cp34m-macosx_10_11_x86_64.whl (83.8 kB) Copy SHA256 Checksum SHA256 cp34 Wheel Nov 10, 2016
pyredblack-0.1.1-cp35-cp35m-macosx_10_11_x86_64.whl (83.6 kB) Copy SHA256 Checksum SHA256 cp35 Wheel Nov 10, 2016
pyredblack-0.1.1.tar.gz (88.7 kB) Copy SHA256 Checksum SHA256 Source Nov 10, 2016

Supported By

WebFaction WebFaction Technical Writing Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Rackspace Rackspace Cloud Servers DreamHost DreamHost Log Hosting