IPython is led by Fernando Pérez.

As of this writing, the following developers have joined the core team:

  • [Robert Kern] <>: co-mentored the 2005 Google Summer of Code project to develop python interactive notebooks (XML documents) and graphical interface. This project was awarded to the students Tzanko Matev <> and Toni Alatalo <>.
  • [Brian Granger] <>: extending IPython to allow support for interactive parallel computing.
  • [Benjamin (Min) Ragan-Kelley]: key work on IPython’s parallel computing infrastructure.
  • [Ville Vainio] <>: Ville has made many improvements to the core of IPython and was the maintainer of the main IPython trunk from version 0.7.1 to 0.8.4.
  • [Gael Varoquaux] <>: work on the merged architecture for the interpreter as of version 0.9, implementing a new WX GUI based on this system.
  • [Barry Wark] <>: implementing a new Cocoa GUI, as well as work on the new interpreter architecture and Twisted support.
  • [Laurent Dufrechou] <>: development of the WX GUI support.
  • [Jörgen Stenarson] <>: maintainer of the PyReadline project, necessary for IPython under windows.

The IPython project is also very grateful to:

Bill Bumgarner <>: for providing the DPyGetOpt module which gives very powerful and convenient handling of command-line options (light years ahead of what Python 2.1.1’s getopt module does).

Ka-Ping Yee <>: for providing the Itpl module for convenient and powerful string interpolation with a much nicer syntax than formatting through the ‘%’ operator.

Arnd Baecker <>: for his many very useful suggestions and comments, and lots of help with testing and documentation checking. Many of IPython’s newer features are a result of discussions with him (bugs are still my fault, not his).

Obviously Guido van Rossum and the whole Python development team, that goes without saying.

IPython’s website is generously hosted at http://ipython.scipy.orgby Enthought ( I am very grateful to them and all of the SciPy team for their contribution.

Fernando would also like to thank Stephen Figgins <>, an O’Reilly Python editor. His Oct/11/2001 article about IPP and LazyPython, was what got this project started. You can read it at:

And last but not least, all the kind IPython users who have emailed new code, bug reports, fixes, comments and ideas. A brief list follows, please let us know if we have ommitted your name by accident:

  • Justin Riley <> Contributions to parallel support, Amazon EC2, Sun Grid Engine, documentation.
  • Satrajit Ghosh <> parallel computing (SGE and much more).
  • Darren Dale <>, traits-based configuration system, Qt support.
  • Dan Milstein <>. A bold refactoring of the core prefilter stuff in the IPython interpreter.
  • [Jack Moffit] <> Bug fixes, including the infamous color problem. This bug alone caused many lost hours and frustration, many thanks to him for the fix. I’ve always been a fan of Ogg & friends, now I have one more reason to like these folks. Jack is also contributing with Debian packaging and many other things.
  • [Alexander Schmolck] <> Emacs work, bug reports, bug fixes, ideas, lots more. The ipython.el mode for (X)Emacs is Alex’s code, providing full support for IPython under (X)Emacs.
  • [Andrea Riciputi] <> Mac OSX information, Fink package management.
  • [Gary Bishop] <> Bug reports, and patches to work around the exception handling idiosyncracies of WxPython. Readline and color support for Windows.
  • [Jeffrey Collins] <> Bug reports. Much improved readline support, including fixes for Python 2.3.
  • [Dryice Liu] <> FreeBSD port.
  • [Mike Heeter] <korora-AT-SDF.LONESTAR.ORG>
  • [Christopher Hart] <> PDB integration.
  • [Milan Zamazal] <> Emacs info.
  • [Philip Hisley] <>
  • [Holger Krekel] <> Tab completion, lots more.
  • [Robin Siebler] <>
  • [Ralf Ahlbrink] <>
  • [Thorsten Kampe] <>
  • [Fredrik Kant] <> Windows setup.
  • [Syver Enstad] <> Windows setup.
  • [Richard] <> Global embedding.
  • [Hayden Callow] <> 1.6 compatibility.
  • [Leonardo Santagada] <> Fixes for Windows installation.
  • [Christopher Armstrong] <> Bugfixes.
  • [Francois Pinard] <> Code and documentation fixes.
  • [Cory Dodt] <> Bug reports and Windows ideas. Patches for Windows installer.
  • [Olivier Aubert] <> New magics.
  • [King C. Shu] <> Autoindent patch.
  • [Chris Drexler] <> Readline packages for Win32/CygWin.
  • [Gustavo Cordova Avila] <> EvalDict code for nice, lightweight string interpolation.
  • [Kasper Souren] <> Bug reports, ideas.
  • [Gever Tulley] <> Code contributions.
  • [Ralf Schmitt] <> Bug reports & fixes.
  • [Oliver Sander] <> Bug reports.
  • [Rod Holland] <> Bug reports and fixes to logging module.
  • [Daniel ‘Dang’ Griffith] <> Fixes, enhancement suggestions for system shell use.
  • [Viktor Ransmayr] <> Tests and reports on Windows installation issues. Contributed a true Windows binary installer.
  • [Mike Salib] <> Help fixing a subtle bug related to traceback printing.
  • [W.J. van der Laan] <> Bash-like prompt specials.
  • [Antoon Pardon] <> Critical fix for the multithreaded IPython.
  • [John Hunter] <> Matplotlib author, helped with all the development of support for matplotlib in IPyhton, including making necessary changes to matplotlib itself.
  • [Matthew Arnison] <> Bug reports, ‘%run -d’ idea.
  • [Prabhu Ramachandran] <> Help with (X)Emacs support, threading patches, ideas...
  • [Norbert Tretkowski] <> help with Debian packaging and distribution.
  • [George Sakkis] <> New matcher for tab-completing named arguments of user-defined functions.
  • [Jörgen Stenarson] <> Wildcard support implementation for searching namespaces.
  • [Vivian De Smedt] <> Debugger enhancements, so that when pdb is activated from within IPython, coloring, tab completion and other features continue to work seamlessly.
  • [Scott Tsai] <> Support for automatic editor invocation on syntax errors (see
  • [Alexander Belchenko] <> Improvements for win32 paging system.
  • [Will Maier] <> Official OpenBSD port.
  • [Ondrej Certik] <>: set up the IPython docs to use the new Sphinx system used by Python, Matplotlib and many more projects.
  • [Stefan van der Walt] <>: support for the new config system.

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