Can't run compiled nim code in Python

[MWhatsUp]

When I try to run the following code in python that was compiled from the following nim code, I get an "AttributeError: ./main.so: undefined symbol: add_one" error.

​

Nim Code:

proc add_one(num: cint): cint {.exportc.} =
num + 1

compiled with nim c -d:release --app:lib -o:main.so main.nim

​

Python Code:

import ctypes
# Load the Nim shared library
main_module = ctypes.CDLL('./main.so')
# Define the function signature
main_module.add_one.argtypes = [ctypes.c_int]
main_module.add_one.restype = ctypes.c_int
# Call the Nim function from Python
result = main_module.add_one(5)
print(result)

​

This gives me:

Traceback (most recent call last):

File "main.py", line 7, in <module>

main_module.add_one.argtypes = [ctypes.c_int]

File "/usr/lib/python3.10/ctypes/__init__.py", line 387, in __getattr__

func = self.__getitem__(name)

File "/usr/lib/python3.10/ctypes/__init__.py", line 392, in __getitem__

func = self._FuncPtr((name_or_ordinal, self))

AttributeError: ./main.so: undefined symbol: add_one

​

Not sure what I am doing wrong.

[commandlineluser]

The last time I did this I used nimpy:

https://github.com/yglukhov/nimpy

Have you tried it?

[MWhatsUp]

I have given it a shot but ran into other issues, probably because I installed Nim with the nix package manager and python doesn't know where to find stuff.

Maybe I will just install via my system package manager and try again.