Created a test function to test if Boost Python can pass a Python list to a C++ method. However, it results in the following error:
Boost.Python.ArgumentError: Python argument types in boost_cpp.test_list() did not match C++ signature: test_list(boost::python::list)
I have been stuck on this issue for a really long time and there is no clear path forward. Any guidance is greatly appreciated.
#include <boost/python.hpp>// Test that passing boost::python::list to C++ works.boost::python::list test_list(boost::python::list input_list) { boost::python::ssize_t size = boost::python::len(input_list); boost::python::list output_list; output_list.append(boost::python::object()); // Append Python None type. output_list *= size; double value; for (unsigned int i = 0; i < size; i++) { value = boost::python::extract<double>(input_list[i]); output_list[i] = value; } return output_list;}BOOST_PYTHON_MODULE(boost_cpp) { using namespace boost::python; def("test_list", test_list);}Created a setup.py for building the extension by running python3 setup.py build_ext --inplace
from distutils.core import setupfrom distutils.extension import Extension# Boost Python test build of C++ extension methods.boost_cpp = Extension( name="boost_cpp", sources=["./boost.cpp"], include_dirs=["/usr/include"], # C++ header files. library_dirs=["/usr/lib"], # C++ libs. libraries=["boost_python39"], extra_compile_args=["-shared","-export-dynamic", ],)setup( name="boost_cpp", version="0.1", ext_modules=[boost_cpp],)import boost_cpplist_0 = [i for i in range(100)]list_1 = boost_cpp.test_list(input_list = list_0)