Are you trying to reuse the Python2 .so file under Python3 without rebuilding it? We aren't going to support that usecase; please just rebuild it via:
$ /path/to/python3 setup.py build_ext
Are you trying to reuse the Python2 .so file under Python3 without
rebuilding it? We aren't going to support that usecase; please just
rebuild it via:
$ /path/to/python3 setup.py build_ext