Extending Python in C

Question

I have successfully extended my python code in C following this:

Call a Python function from within a C program

I have compiled the code and created a .dll. However, when I opened it with the dependencywalker I have seen that it still requires the python code. I want the dll to be standalone, so it doesn't depend on the script .py. I thought that using the tag -static in g++ would be enough but it doesn't work for me.

You want a Python subroutine in your C-program, or you want a C-subroutine in your Python program? — Lorinczy Zsigmond
– Lorinczy Zsigmond, Commented Apr 25, 2021 at 9:29
@LorinczyZsigmond I want the Python subroutine in my compiled C-Program, so I don't need to have the python source code in the same folder. — Jonw3
– Jonw3, Commented Apr 25, 2021 at 18:09
Then find a Python-to-C or Python-to-machine_code translator. — Lorinczy Zsigmond
– Lorinczy Zsigmond, Commented Apr 27, 2021 at 13:17

Nimantha · Accepted Answer · 2023-11-20 15:49:26Z

2

The Python documentation has a chapter on Extending and Embedding Python with C.

With good enough coding conventions this can by applied to C++ code. You will use extern "C" to declare functions coded in C++ callable from C.

Be careful to avoid throwing a C++ exception to Python code.

On Linux, see also dlopen(3) and dlsym(3) and the C++ dlopen mini howto.

Python is open source. You should consider downloading its C source code and studying it.

Be aware of the GIL in Python. Multi-threading C++ code will be tricky.

Consider also generating C or C++ code with tools like RefPerSys or ANTLR, or writing in Python your C or C++ code generator.

Perhaps use static source code analyzers (like Frama-C or Bismon) on your C source code.

Be aware that C and C++ are different programming languages. See this and n1570 and n3337 or better.

edited Nov 20, 2023 at 15:49

Nimantha

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answered Apr 24, 2021 at 12:14

Basile Starynkevitch

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