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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Did you add a reference to the dll before importing it - like this:<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>import clr<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>clr.AddReference(“myclib.dll”)<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> users-bounces@lists.ironpython.com
[mailto:users-bounces@lists.ironpython.com] <b>On Behalf Of </b>Anders Elfgren<br>
<b>Sent:</b> Thursday, July 31, 2008 9:22 AM<br>
<b>To:</b> users@lists.ironpython.com<br>
<b>Subject:</b> [IronPython] Using a c library as a dll or assembly<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi,
</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>First
let me say that I'm new to Iron Python, but at least I've read this in the
FAQ.. :)</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Q:
How do I build and call into <b><span style='color:black;background:#A0FFFF'>PYD</span></b>
libraries?</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>A:
<b><span style='color:black;background:#FFFF66'>IronPython</span></b> does not
support using PYDs built for CPython since they leverage implementation details
of CPython. You can get a similar effect for new "<b><span
style='color:black;background:#A0FFFF'>PYD</span></b>"s you would like to
implement by writing them in C# or VB and building a DLL for .NET.<o:p></o:p></span></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>That
said, I've got some questions to see if what I'm doing is possible anyway.</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>We've
got a c library of which most of the code has also been written in Python. We
want to create an editor using .net forms which we can use to edit some files,
and to do that we need some data structures that exist in this library. </span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>My
current idea is to interface against the python library using IronPython, and
then accessing the datastructures through that in C# (although if absolutely
necessary, we could write the editor in IronPython too). The thing that is
standing against me now is that one function that exists a small C dll. Since
IronPython can't access this (unless this has changed since the FAQ was
written?), I was thinking that maybe I can compile the dll using the /clr flag
and thus get a .net assembly. Would I then be able to use the function?</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
Python code just tries to import it:</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>import AvHash</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>And
then use it..</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>def
AdfHash(str):<br>
return AvHash.HashString(str)</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>At
the import statement, this error is raised:</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Traceback
(most recent call last):<br>
File X:\ctg\libs\ADF\main\common\modeditor.ipy, line 20, in Initialize<br>
File , line 0, in __import__##4<br>
File X:\ctg\libs\ADF\main\common\AdfLib.py, line 1, in Initialize<br>
File , line 0, in __import__##4<br>
ImportError: No module named AvHash</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Or
is there some other solution? I've just started researching how to interface
between C/C#/Python/IronPython so there may well be things I haven't heard
of...</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
hope I've made my problem clear, thanks for any responses. :)</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>/Anders</span><o:p></o:p></p>
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