AttributeError: python3: undefined symbol: gmshInitialize

Good morning, I just try to use the python gmsh API and I got this error:

Traceback (most recent call last):
  File "t1.py", line 6, in <module>
    gmsh.initialize()
  File "/home/kenn/Data/S/M2MPEMeca/Stage/1-hybride-par-zone/gmsh.py", line 217, in initialize
    lib.gmshInitialize(
  File "/usr/lib/python3.7/ctypes/__init__.py", line 369, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.7/ctypes/__init__.py", line 374, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: python3: undefined symbol: gmshInitialize

I'm on Debian 10 and install the gsmh sdk by using pip install gmsh-sdk. I have also try to add the "lib" directory from the SDK to PYTHONPATH, with export PYTHONPATH=${PYTHONPATH}:${PWD}/lib.

Can you help me please ?