[Ironpython-users] Windows C-DLL and find_module issues

[Matt Tatro]

Thanks for the response, that answer that then ;-)

 

Is there any other Python implementation on Windows that will work?

 

With other languages  I mean that I have tested the DLL in TCL and just
straight 'C' and it works great. 

 

 

Matt

 

From: Slide [mailto:slide.o.mix at gmail.com] 
Sent: Monday, August 5, 2013 5:45 PM
To: Matt Tatro
Cc: ironpython-users at python.org
Subject: Re: [Ironpython-users] Windows C-DLL and find_module issues

 

IronPython does not support C based modules directly, you would have to
write a wrapper for your DLL in C# (or another .NET language) and have it
used from there. 

 

When you say it works in other languages, what do you mean?

 

Thanks,

 

slide

 

On Mon, Aug 5, 2013 at 1:03 PM, Matt Tatro <matttatro at gmail.com
<mailto:matttatro at gmail.com> > wrote:

Hi Everyone,

 

I am struggling with what I thought would be something simple.even though I
am not that familiar with Python.

 

I generated a Python interface file using SWIG for a C-DLL. No errors doing
that. When the 'import' is used and the code of the SWIG generated file
executes it cannot find the DLL.

 

Below the code snippet from the SWIG generated PY file:

 

from sys import version_info

if version_info >= (2,6,0):

    def swig_import_helper():

        from os.path import dirname

        import imp

        fp = None

        try:

            fp, pathname, description = imp.find_module('_Hamlib',
[dirname(__file__)])

        except ImportError:

            import _Hamlib

            return _Hamlib

        if fp is not None:

            try:

                _mod = imp.load_module('_Hamlib', fp, pathname, description)

            finally:

                fp.close()

            return _mod

    _Hamlib = swig_import_helper()

    del swig_import_helper

else:

    import _Hamlib

del version_info

 

 

Essentially the 'find_module' cannot find the DLL (which is in the same
directory and I have used dependency walker). What I have found is that
using 'get_suffixes' only returns one extension 'py' - nothing else. I have
tried renaming the DLL to PYD, but that doesn't help either. The actual dll
file is 'libhamlib-2.dll' and changing the filename doesn't help. 

 

Using the DLL in other languages works fine.

 

Any help out there? I am using the latest version of IronPython and VS 2012.

 

Thanks

 

 

Matt


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