Pinocchio does not work on a fresh python3.10

[tomsch420]

Bug description

Greetings, i am having trouble using pinocchio with python3.10.
I made a new python3.10 virtual environment, updated pip and installed pinocchio. I could not import pinocchio.
I hope this helps.

Expected behavior

I expect to be able to import pinnocchio.

Reproduction steps

Steps to reproduce the behavior:

mkvirtualenv -p python3.10 pin-test
pip install -U pip
pip install pin
python -c "import pinocchio"

This results in the error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/tom_sch/.virtualenvs/pin-test/lib/python3.10/site-packages/cmeel.prefix/lib/python3.10/site-packages/pinocchio/__init__.py", line 19, in <module>
    from .pinocchio_pywrap_default import *
ImportError: /usr/lib/x86_64-linux-gnu/libboost_python38.so.1.71.0: undefined symbol: _Py_fopen

System

• OS: Ubuntu 20.04
• Pinocchio version: 3.4.0

[ManifoldFR]

Hey there,

If you check the linking error, it mentions a libboost_python38 - which is Boost.Python for Python 3.8. it seems like the Pinocchio module that Python is trying to import was made for Python 3.8 or that the interpreter is pulling the wrong Boost.Python. This means there's maybe another Boost.Python, than the one you need, on your library path or PYTHONPATH.

Are you sure the import is pulling in the right binaries? You use cmeel, do you have the boost.python cmeel installed?
You could debug this using importlib I think.