Boost.python3 C++ 返回tuple

參考官方文檔https://www.boost.org/doc/libs/1_72_0/libs/python/doc/html/reference/object_wrappers/boost_python_tuple_hpp.html

需要提前安裝庫

sudo apt install libboost-all-dev

實際編寫的代碼:

1. test_tuple.cpp

#include <boost/python.hpp>
#include <set>
#include <map>
#include <memory>
#include <iostream>
#include <chrono>
#include <stdlib.h>
#include <math.h>
#include <cstdio>
#include <boost/python/numpy.hpp>
#include <opencv2/opencv.hpp>
#include <list>
#include <pthread.h>


namespace np = boost::python::numpy;
namespace py = boost::python;
using namespace boost::python;
using namespace std;
using namespace cv;

py::tuple test_return_tuple()
{
    return py::make_tuple(123,"hellow");
}

BOOST_PYTHON_MODULE(test_tuple)
{
    
    def("test_return_tuple", test_return_tuple);       

}

注意命名空間問題，tuple 這個類在c++ 其他類中也可能存在。

2. CMakeLists.txt

cmake_minimum_required(VERSION 3.6.0 FATAL_ERROR)

project(rtmp_streaming VERSION 1.0.0 DESCRIPTION "rtmp streaming based on ffmpeg")


set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -std=c++14 -Wall")

set ( CMAKE_EXE_LINKER_FLAGS_DEBUG  "${CMAKE_EXE_LINKER_FLAGS_DEBUG}  ")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}  -std=c++14 -Wall -O0 -fno-omit-frame-pointer")

find_package(PythonInterp 3.6 REQUIRED)
find_package(PythonLibs 3.6 REQUIRED)

set(Python_ROOT_DIR "")


set(BOOST_PYTHONLIB python3)

find_package(Boost COMPONENTS ${BOOST_PYTHONLIB})
find_package(OpenCV  REQUIRED)


include(CMakeToolsHelpers OPTIONAL)


include_directories(${PYTHON_INCLUDE_DIRS})
include_directories(${OpenCV_INCLUDE_DIRS})

link_directories(${Boost_LIBRARY_DIR})




#SET_TARGET_PROPERTIES(test_tuple PROPERTIES PREFIX "")
add_library(test_tuple SHARED tuple.cpp)

set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR})

target_link_libraries(test_tuple  ${OpenCV_LIBS} ${Boost_LIBRARIES} boost_numpy3 /usr/lib/x86_64-linux-gnu/libpython3.6m.so)

編譯生成的libtest_tuple.so 拷貝到test_tuple.py 同一級目標，並且更名爲test_tuple.so

3. test_tuple.py

from test_tuple import test_return_tuple


print(test_return_tuple())