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IronPython for .NET 4

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Previews of IronPython for .NET 4 have been shipping along with VS 2010, but that does not mean the two are tied together. While Microsoft intends to launch IronPython for .NET 4 and Visual Studio 2010 on the same day, they will remain on separate development cycles for the foreseeable future.

IronPython for .NET 4 will be compatible with Python 2.6. There are currently no definite plans for supporting Python 3.1. Python 3.1 is a significant break from the 2.x series. In addition to significant improvements over earlier versions of the language, it will remove many features that are no longer considered to be desirable. This means Python 3.1 is not backwards compatible, which in turns has lead to a slow adoption for Python 3.1.

The final version of IronPython for .NET 4.0 will support C#’s new dynamic keyword as well as the improved version of VB’s implicit late binding.

Editor's note - This article originally discussed Python 3.1 support based on information gleaned at an IronPython presentation in Copenhagen. That information was incorrect, and there is in fact no confirmed date for 3.x compatibility according to the timeline at DevHawk. The article above has been updated to reflect this

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Community comments

  • Except there is no VS integration

    by Dan Tines,

    Your message is awaiting moderation. Thank you for participating in the discussion.

    Well, the 3rd party VS integration seems to be broken and somewhat unmaintained.

  • Misinformation

    by David Fugate,

    Your message is awaiting moderation. Thank you for participating in the discussion.

    I'm curious what the sources were for this as most of the facts are incorrect:
    1. There will be an IronPython 2.6 release supporting C#'s new dynamic keyword almost immediately after Visual Studio 2010 is released; not 1 to 3 months later
    2. There are no current plans to support Python 3.0/3.1 features in this release

  • Re: Misinformation

    by Jonathan Allen,

    Your message is awaiting moderation. Thank you for participating in the discussion.

    This information comes from the Pumping Iron presentation by Harry Pierson in Copenhagen. There is a recording of it on Channel 9.

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