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PyZMQ: Python bindings for zeromq
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PyZMQ: Python bindings for 0MQ

This package contains Python bindings for 0MQ. 0MQ is a lightweight and fast messaging implementation.


Current release of pyzmq is 2.1.4, and targets libzmq-2.1.4. For zeromq 2.0.10 or maint branch, use pyzmq release or the 2.0.x development branch.

PyZMQ versioning follows 0MQ versioning. In general, your pyzmq version should be the same as that of your libzmq, but due to the generally growing API of zeromq, your pyzmq should not be newer than your zeromq. This is a strict restriction for pyzmq <= 2.1.0, but we intend to support zeromq >= 2.1.0 for pyzmq 2.1.x.


See PyZMQ's Sphinx generated documentation on GitHub for API details, and some notes on Python and Cython development.


Unless you specifically want to develop PyZMQ, we recommend downloading the PyZMQ source code from our github download page here:

While you can also get the latest source code by forking our github repository, building from the repository will require that you download and install Cython version 0.13 or later.

Building and installation


To build and install this Python package, you will first need to build and install the latest development version of 0MQ itself. After you have done this, follow these steps:

Tell pyzmq where zeromq is via the configure subcommand:

$ python configure --zmq=/path/to/zeromq2

or the zmq install directory on OSX/Linux:

$ python configure --zmq=/usr/local

The argument should be a directory containing a lib and a include directory, containing libzmq and zmq.h respectively.

Second, run this command:

$ python install

Cython is not required to build pyzmq from a release package, but it is required if you want to develop pyzmq, or build directly from our repository on GitHub.


On Windows, libzmq.dll will be copied into the zmq directory, and installed along with pyzmq, so you shouldn't need to edit your PATH.

It is best to compile both ØMQ and PyØMQ with Microsoft Visual Studio 2008 or above. You should not need to use mingw.

Current testing indicates that running

$ python bdist_msi

successfully builds an MSI installer.


If you install libzmq to a location other than the default (/usr/local) on Linux, you may need to do one of the following:

  • Set LD_LIBRARY_PATH to point to the lib directory of 0MQ.

  • Build the extension using the --rpath flag:

    $ python build_ext --rpath=/opt/zeromq-dev/lib --inplace


To develop PyZMQ, you will need to install Cython, version 0.13 or greater. After installing Cython, instead of doing python install do:

$ python build_ext --inplace
$ python develop

This will build the C extension inplace and then put this directory on your sys.path. With this configuration you only have to run:

$ python build_ext --inplace

each time you change the .pyx files. To clean the sources, you can do:

$ python clean


To run the test suite after installing, just do:

$ python test

How to release PyZMQ

Currently, we are using the following steps to release PyZMQ:

  • Check the version number in version.pyx.

  • Remove old MANIFEST and egg-info files and dist and build directories.

  • Check

  • Register the release with pypi:

    python register
  • Build source distributions and upload:

    python sdist --formats=zip,gztar upload
  • Upload the tarball and .zip file to github.

  • Branch the release:

    git checkout -b 2.1.4 master
    git push origin 2.1.4
  • Tag the release:

    git tag -a -m "Tagging release 2.1.4" v2.1.4
    git push origin --tags
  • Make sure the README.rst has an updated list of contributors.

  • Announce on list.


This project was started by and continues to be led by Brian E. Granger (ellisonbg AT gmail DOT com).

The following people have contributed to the project:

  • Carlos Rocha (carlos DOT rocha AT gmail DOT com)
  • Andrew Gwozdziewycz (git AT apgwoz DOT com)
  • Fernando Perez (fernando DOT perez AT berkeley DOT edu)
  • Nicholas Piel (nicholas AT nichol DOT as)
  • Eugene Chernyshov (chernyshov DOT eugene AT gmail DOT com)
  • Justin Riley (justin DOT t DOT riley AT gmail DOT com)
  • Ivo Danihelka (ivo AT denihelka DOT net)
  • Thomas Supra (tomspur AT fedoraproject DOT org)
  • Douglas Creager (dcreager AT dcreager DOT net)
  • Erick Tryzelaar (erick DOT tryzelaar AT gmail DOT com)
  • Min Ragan-Kelley (benjaminrk AT gmail DOT com)
  • Scott Sadler (github AT mashi DOT org)
  • spez (steve AT hipmunk DOT com)
  • Thomas Kluyver (takowl AT gmail DOT com)
  • Baptiste Lepilleur (baptiste DOT lepilleur AT gmail DOT com)
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