A working example of communication between cpython and c via the ctypes module.
Make sure you have docker install and then run:
docker run $(docker build -q .)
The output will display python and c interacting via ctypes:
[LogFromPy]: Calling test_primitive_function
[LogFromC ]: c-side primitive_function received args: [intArg={1111},strArg={Be}]
[LogFromPy]: Calling test_pointer_all_c_side
[LogFromC ]: OurStruct([number={0},string={(null)}])
[LogFromPy]: Calling test_mixed_pointers
[LogFromC ]: OurStruct([number={3333},string={Not}])
[LogFromPy]: Calling test_mixed_pointers_2
[LogFromC ]: OurStruct([number={4444},string={Judgmental}])
[LogFromPy]: Calling test_py_primes_vs_c_primes
[LogFromPy]: Computing the first 350,000 primes in both c and python. This can take a minute...
[LogFromPy]: It took python 30 seconds and c 4 seconds to complete the computation. Using c gives you a 8.57x speedup.