Boost Python基本示例不起作用

Boost Python basic example does not work

本文关键字：不起作用 Python Boost      更新时间：2023-10-16

尝试Boost Python快速入门中最简单的Hello World示例

#include <boost/python.hpp>
char const* greet()
{
    return "hello, world";
}
BOOST_PYTHON_MODULE(hello_ext)
{
    using namespace boost::python;
    def("greet", greet);
}

在Windows上使用下面的CMake编译项目:

cmake_minimum_required(VERSION 3.2)
project(hello_ext CXX)
set(TARGET hello_ext)
set(BOOST_MIN_VERSION "1.61.0")
set(Boost_ADDITIONAL_VERSIONS "1.61.0" "1.61")
set(BOOST_ROOT ${MY_BOOST_DIR}) 
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_STATIC_RUNTIME OFF)
set(Boost_USE_MULTITHREADED ON)
find_package(PythonLibs 3.4 REQUIRED )
find_package(Boost 1.61.0 COMPONENTS python REQUIRED) 
file(GLOB SOURCES *.cpp)
include_directories(${INCLUDE_DIRS} ${Boost_INCLUDE_DIRS} ${PYTHON_INCLUDE_DIRS})
python_add_module(${TARGET} ${SOURCES})
target_link_libraries(${TARGET} ${Boost_PYTHON_LIBRARY} ${PYTHON_LIBRARIES})

模块成功编译为hello_ext.pyd。试图从放置在同一目录下的Python脚本访问它:

import hello_ext
print(hello_ext.greet())

获取以下执行结果:

python3 test_cpp.py

导入错误:DLL加载失败:无法找到指定的模块

也，尝试放置hello_ext。pyd到Python DLL目录(C:/Python34/DLL)，结果相同

Windows 7 32位

c++编译器:Visual c++ 2015

Python 3.4.2, Boost 1.61

更新:解决，见下文

我添加了一个包含Boost Python *的目录。lib和*.dll文件到PATH。它使示例工作

这是针对mac用户的，因为我尝试了上面的解决方案，它不适合我使用osx el capitan。我有两个CMakeLists.txt的工作，但是，我不认为他们是一个问题的基础上，https://gitlab.kitware.com/cmake/cmake/issues/16335。

PROJECT(example)
set(CMAKE_CXX_STANDARD 11)
set( CMAKE_EXPORT_COMPILE_COMMANDS ON )
cmake_policy(SET CMP0042 NEW)
set(EIGEN_DIR "/usr/local/include/eigen3/" )
set(PYTHON_INCLUDE_DIRS "//anaconda/include/python2.7")
set(PYTHON_LIBRARY "//anaconda/lib/libpython2.7.dylib")
find_package(Boost 1.66.0 COMPONENTS python)
if(Boost_FOUND)
    include_directories(${Boost_INCLUDE_DIRS} ${EIGEN_DIR} ${PYTHON_INCLUDE_DIRS} include)
    set(Boost_USE_STATIC_LIBS OFF)
    set(Boost_USE_MULTITHREADED ON)
    set(Boost_USE_STATIC_RUNTIME OFF)
    add_library (yay MODULE src/example_ext.cpp)
    target_link_libraries(yay ${Boost_LIBRARIES} ${PYTHON_LIBRARY})
endif()
PROJECT(example)
set(CMAKE_CXX_STANDARD 11)
set( CMAKE_EXPORT_COMPILE_COMMANDS ON )
cmake_policy(SET CMP0042 NEW)
set(EIGEN_DIR "/usr/local/include/eigen3/" )
find_package(Boost 1.66.0 COMPONENTS python3)
if(Boost_FOUND)
    set(Boost_USE_STATIC_LIBS OFF)
    set(Boost_USE_MULTITHREADED ON)
    set(Boost_USE_STATIC_RUNTIME OFF)
    find_package(PythonLibs REQUIRED)
    include_directories(${Boost_INCLUDE_DIRS} ${EIGEN_DIR} ${PYTHON_INCLUDE_DIRS} include)
    add_library (yay SHARED src/example_ext.cpp)
    target_link_libraries(yay ${Boost_LIBRARIES} ${PYTHON_LIBRARY})
endif()
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