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Rating:        Based on 14 ratings
Reviewed:  10 reviews
Downloads: 40250
Released: Dec 10, 2008
Updated: Jul 23, 2009 by dfugate
Dev status: Stable Help Icon

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Application IronPython.msi
application, 5137K, uploaded Dec 10, 2008 - 16267 downloads

Other Available Downloads

application, 2122K, uploaded Dec 10, 2008 - 6878 downloads
Source Code
source code, 2881K, uploaded Dec 10, 2008 - 4061 downloads
example, 639K, uploaded Dec 10, 2008 - 13044 downloads

Release Notes

The IronPython and Dynamic Language Runtime teams are proud to announce the release of IronPython 2.0 final. IronPython 2.0 is the culmination of nearly two years worth of work resulting in a CPython 2.5 compatible release on .NET 2.0 SP1. By far, the biggest change to 2.0 is that our 1.1 codebase was refactored to run on top of the Dynamic Language Runtime. With this we automatically get improvements in many feature areas such as better .NET interop support and hosting Python from managed code. There have been many other major improvements as well. The most notable are:
  • An MSI installer for Windows platforms which includes parts of the CPython 2.5 standard library
  • IronPython assemblies targeting Silverlight and tools such as Chiron to improve the Silverlight dynamic development experience
  • The addition of more C-based standard modules such as cmath and _winreg
  • Significant improvements in importing compatibility and features
  • Distribution of IronPython under the Microsoft Public License which has been approved by OSI
  • Performance improvements. On that note, a new Wiki page has been created for IronPython performance reports - see
  • Over 500 bugs have been closed in 2.0. 453 of these were reported on CodePlex
  • Support for precompilation of Python source files into a single dll

This seems like an opportune time to remind everyone that we fix bugs based on the number of votes they have on CodePlex. As we’re planning on releasing IronPython 2.0.1 fairly soon, please vote for your favorite bugs at to help ensure they get fixed in time for the next release.

We’d like to extend our gratitude to everyone in the IronPython community who reported bugs thereby making this a better release: milind, romank, chadaustin, sjmachin, davidfraser, TimothyFitz, drewid, sanxiyn, bashmohandes, pobrien, perhaps, haypo, Undebtedly, ayarrow, tscottwcp, rope, arman0, eshaish, nivaldo, fuzzyman, CurtHagenlocher, Eloff, brucec, pysunil, jacobg23, mziller, beaugunderson, gbraad, Oceanborn, tarlano, jbevain, glchapman, anthonybaxter, jdhardy, jjlee, haibo, doubleyewdee, jackeyoo, whit537, sdahlbac, PeteHufnagel, jtenney, nriley, junfeng, grizlupo, rridge, lewisle, JoelBondurant, johnplatt, lthompson, debackerl, googen, tscottw, VoteFw, leppie, Qvin, heyssion2, CriGoT, baxeno, sbergman, Laurion, luntain, oldman, christmas, 05031972, kevgu, wilberforce, Korbinian, lclj, sorokerr, Eriol, tatwright, ais, TraumaPony, pelikhan, asafk, felixpollan, srid, atifaziz, vernondcole, fwereade, zpy, yanne, facorreia, Daneel, zvikag, psykotic, Cavingdeep, BEaton, sborde, orbital56, fbourgeois, antont, krosavcheg, ktc1, awilkins, ben2004uk, paulfelix, axl, JeffreySax, Lawouach, and KKI.

Updates to the IronPython 1.0 samples will be released shortly. Stay tuned to the IronPython mailing list for details.

IronPython 2.0's file version is 2.0.11121.

Reviews for this release

Very good release. But Ironpython misses attributes & calling win32 api's. Ironpython team definitely include this feature.
by py_sunil on Jan 28, 2009 at 12:37 PM
Enjoying it. Please provide more documentation, especially on embedded use. Thanks.
by appletsauce on Jan 17, 2009 at 11:06 PM
Download fails repeatedly on 2 machines, both with XP, after I've confirmed licence-agreement. Virusscanner and its firewall switched off. Jan 16 2008 11:42. I hope this is fixed, because I'd really like to try V2.0, using V1.0 dayly and am very satisfied with it.
by jdehooge on Jan 16, 2009 at 10:43 AM
Doc directory no longer present (presumably because info no longer up to date)? But then Tutorial.htm is very hard to read since the link to ../Doc/IronPython.css is also disabled. For now suggest people also get 1.1.2 release, copy its doc dir, and manually re-enable the stylesheet link. Tutorial also still mentions embedding in 2nd para, but the Embedding IronPython tutorial has been removed :(
by Scrubber on Dec 31, 2008 at 11:10 AM
I am trying to download, but it's always fail.
by zhuyizhao on Dec 29, 2008 at 3:20 AM
good work,well done. i will use it as sctriping language in my XNA game engine!
by babaq on Dec 24, 2008 at 2:51 PM
No problem whatsoever with the download. In any event, why should performance of the hosting site affect the rating of the released software itself? Having an MSI download is excellent. I'd love to see an integrated language subscription/download/update service -- perhaps Windows Update. If we had that, I'd be very happy about things.
by kfarmer on Dec 23, 2008 at 1:02 AM
There is no problem with the download. Excellent release, thanks for the work. People having download problems need to check their connection, and may be affected by network traffic on shared connections.
by MarkTab on Dec 22, 2008 at 6:50 PM
there is a problem with the download - it is extremely slow and unacceptable. Similar download problem to the SQL Server 2008 Sample databases in CodePlex.
by c1sbc on Dec 22, 2008 at 4:40 AM
Thank you for release!
by AlexanderByndyu on Dec 15, 2008 at 10:15 AM