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So, I'm interested in communicating between a C program and a Python program so that I can neatly send tasks and data between the two.

I figured I'd go ahead and start with this guide. In this guide I have a C file with contents outlined in the example in the link right above the "Building and Installing Extensions" title and the python code from right under it. After I run the python setup.py install command I try to import the created module through

>>>import helloworld                                                                                                   
ImportError: DLL load failed: %1 is not a valid Win32 application.

So I suppose the issue is that the extension is 32-bit while my Python installation is 64-bit? The python I'm using is

Python 3.6.4 |Anaconda, Inc.| (default, Jan 16 2018, 10:22:32) [MSC v.1900 64 bit (AMD64)] on win32

All help appreciated!

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  • I think you have answered your own question. Compile your DLL as 64-bit. Commented Jun 6, 2018 at 23:32
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