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I try to create an executable using Cython with embedded Python (look here). I can find examples doing this on Linux, but not on Windows. The only Windows example I can find results in an executable that calls the python dll (here). But this is not what I am looking for. I want a standalone executable that does not call the python dll.

Below what I did:

First the program (hello.py):

print("hello")

I run Cython with the --embed option in an anaconda prompt:

cython hello.py --embed

This results in a c file with a main function (hello.c).

Then set the appropriate environment variables:

"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat"

Then compile and link this:

"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\cl.exe"  /nologo /Ox /MD /W3 /GS- /DNDEBUG -Ic:\Anaconda3_5.2.0\include -Ic:\Anaconda3_5.2.0\PC /Tchello.c /link /OUT:"test.exe" /SUBSYSTEM:CONSOLE /LIBPATH:C:\Anaconda3_5.2.0\libs /LIBPATH:C:\Anaconda3_5.2.0\PCbuild\amd64 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\LIB\amd64" "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\ATLMFC\LIB\amd64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.10240.0\ucrt\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\lib\um\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\8.1\lib\winv6.3\um\x64"

This results in a small (19 KB) executable (test.exe).

To run this set the PYTHONPATH

set PYTHONPATH=C:\Anaconda3_5.2.0

and call the program

test.exe

This runs whitout any problems, but Python is not embedded as it calls python36.dll. I suppose the compiling and linking must be done differently, but I don't know how. Does anybody know how to create a windows executable that embeds the Python interpreter using Cython? Any help will be greatly appreciated.

Improve this question
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  • What do you mean by " but Python is not embedded" exactly? The program doesn't run something different? Commented Feb 13, 2020 at 8:52
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    @ead I think what OP means is "Python is not statically linked into the executable" Commented Feb 13, 2020 at 20:04
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    "embeded Python" doesn't mean the Python-library is statically linked. The first question, do you have static python library in your distribution? Here is a question about static linking on Linux: stackoverflow.com/q/48796014/5769463 which is different than on Windows... Commented Feb 14, 2020 at 9:31
  • DavidW is right. But am I misunderstanding the meaning of embedded in github.com/cython/cython/wiki/EmbeddingCython? Commented Feb 14, 2020 at 9:54
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    @ead By the way this is a good idea! Is there a way to statically link Python-library (python38.dll and even vcruntime140.dll etc. and maybe all the DLLs in the list given here) on Windows when using cython --embed? Commented Jul 18, 2022 at 19:56
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