Sometimes running `extism-py` prints `Could not find platform dependent libraries <exec_prefix>`

[zshipko]

We should look into what's causing that message and how to fix it

[mapix]

@zshipko I encountered the same issue on my Mac M1. My Python environment was created with Conda using Python 3.11 (since 3.12 seems to break some syntax). This error prevents operations involving JSON from working. Interestingly, compiling in the root directory of the python-pdk repository works fine, but not in other directories. I was able to bypass the issue by setting PYTHONPATH and PYTHONHOME.

(exism) [Proxy] ➜  python-pdk git:(main) ✗ ./extism-py examples/count-vowels.py -o count-vowels.wasm 
(exism) [Proxy] ➜  python-pdk git:(main) ✗ extism call out.wasm count_vowels --wasi --input='Hello World Test!'
Error: open out.wasm: no such file or directory
(exism) [Proxy] ➜  python-pdk git:(main) ✗ extism call count-vowels.wasm count_vowels --wasi --input='Hello World Test!' 
{"count": 4}
(exism) [Proxy] ➜  python-pdk git:(main) ✗ extism-py examples/count-vowels.py -o count-vowels.wasm                    
(exism) [Proxy] ➜  python-pdk git:(main) ✗ cd ..
(exism) [Proxy] ➜  workspace  ✗ extism-py python-pdk/examples/count-vowels.py -o python-pdk/count-vowels.wasm
Could not find platform dependent libraries <exec_prefix>
(exism) [Proxy] ➜  workspace  ✗ PYTHONPATH=$(python -c "import sys, os.path; print(':'.join([p for p in sys.path if os.path.exists(p)]))") PYTHONHOME=$(python -c "import sys;print(sys.exec_prefix)") extism-py python-pdk/examples/count-vowels.py -o python-pdk/count-vowels.wasm
(exism) [Proxy] ➜  workspace ✗ extism call python-pdk/count-vowels.wasm count_vowels --wasi --input='Hello World Test!' 

{"count": 4}

[zshipko]

Re-opening, it looks like this is not fixed by #17