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<p class=MsoNormal>Hello Python Community,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We’re quite pleased to announce the release of
“IronPython 2.6 CTP for .NET 4.0 Beta 1”. This is our second
preview of IronPython running under the Dynamic Language Runtime that is built
directly into a .NET 4.0 release! As before, this release allows you to
use IronPython objects and types as .NET 4.0 <i>dynamic</i> objects from within
C# and Visual Basic code. While this release does share a bit in common
with the upcoming IronPython 2.6 Beta 1 release (e.g., a number of MSI
improvements), the core functionality is essentially that of IronPython 2.6
Alpha 1. Please also note that “IronPython 2.6 CTP for .NET 4.0
Beta 1” will run only under .NET 4.0 Beta 1.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Here’s a small example showing just how powerful the
new <i>dynamic</i> feature is for taking advantage of dynamic language
functionality in statically typed languages:<o:p></o:p></p>
<p class=MsoNormal> <mock.py><o:p></o:p></p>
<p class=MsoNormal> import random,
math<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> class
Mock(object): <o:p></o:p></p>
<p class=MsoNormal>
def __getattr__(self, key):<o:p></o:p></p>
<p class=MsoNormal>
"""Mock objects of this type will dynamically implement any
requested member"""<o:p></o:p></p>
<p class=MsoNormal>
return
random.choice(["hello world", math.pi])<o:p></o:p></p>
<p class=MsoNormal> </mock.py><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> <dynamic_demo.cs><o:p></o:p></p>
<p class=MsoNormal> using System;<o:p></o:p></p>
<p class=MsoNormal> using
IronPython.Hosting;<o:p></o:p></p>
<p class=MsoNormal> using
Microsoft.Scripting.Hosting;<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> public class
dynamic_demo {<o:p></o:p></p>
<p class=MsoNormal>
static void Main()
{ <o:p></o:p></p>
<p class=MsoNormal>
var ipy =
Python.CreateRuntime();<o:p></o:p></p>
<p class=MsoNormal>
dynamic mock =
ipy.UseFile("mock.py");<o:p></o:p></p>
<p class=MsoNormal>
dynamic m = mock.Mock();<o:p></o:p></p>
<p class=MsoNormal>
//The Python Mock type dynamically implements any member that is
requested of it<o:p></o:p></p>
<p class=MsoNormal>
System.Console.WriteLine(m.the_csharp_compiler_cannot_possbily_know_this_member_exists_at_compile_time);<o:p></o:p></p>
<p class=MsoNormal>
}<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal> <dynamic_demo.cs><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>To try out this preview release:<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Install some variant of .NET 4.0 Beta 1 or Visual
Studio 2010 Beta 1. E.g., <span style='color:#1F497D'><a
href="http://www.microsoft.com/downloads/details.aspx?FamilyID=ee2118cc-51cd-46ad-ab17-af6fff7538c9&displaylang=en">http://www.microsoft.com/downloads/details.aspx?FamilyID=ee2118cc-51cd-46ad-ab17-af6fff7538c9&displaylang=en</a></span><o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Install IronPython.msi from <a
href="http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=27320">http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=27320</a>
<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Follow any of the many <i>dynamic</i> walkthroughs
online. <a
href="http://blogs.msdn.com/vbteam/archive/2008/12/17/walkthrough-dynamic-programming-in-visual-basic-10-0-and-c-4-0-lisa-feigenbaum.aspx">http://blogs.msdn.com/vbteam/archive/2008/12/17/walkthrough-dynamic-programming-in-visual-basic-10-0-and-c-4-0-lisa-feigenbaum.aspx</a>
would be a good start<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Have fun!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The IronPython Team<o:p></o:p></p>
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