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More iterator tools

Project Description

More useful tools for Python iterators. A set of common utility functions.

[![Build Status](](

Relationship to itertools

The itertools package (with an s) is a package in the standard library. It differs from itertoolz (with a z) in the following ways.

  • itertools has an s. itertoolz has a z.
  • itertools is strictly a library of [streaming algorithms]( while itertoolz accepts functions that require finite iterators.
  • itertools changes very slowly and is managed by the official Python community (you submit a PEP). itertoolz is more loose (you submit a pull request)
  • itertools is minimal. itertoolz accepts recipes.


[Matthew Rocklin](


New BSD. See [License File](LICENSE.TXT).


itertoolz is on the Python Package Index (PyPi)

pip install itertoolz


easy_install itertoolz

or from source

./ install


itertoolz supports Python 2.6+ and Python 3.2+ with a common codebase.

It has no dependencies outside of the standard library.

Release History

This version
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Source None Sep 11, 2013

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