我有一些我想从 C++ 中使用的 python 代码,我想在 lib 或 dll 中构建它?我该怎么做?代码有依赖关系:
import socket
import string
import struct
import sys
也许PIL
Cython 库helloWorld.pyx
:
import sys
sys.path.append(".") #yourlib is in current folder
import yourlib #you can import any python module
cdef public void helloWorld():
print "Hello World Cython!"
yourlib.helloWorld("Python")
cdef public int my_sum(int x, int y):
return x*x+y
from libcpp.string cimport string
cdef public string testString( string sx, string sy ):
x = int(sx.c_str())
y = int(sy.c_str())
ret= "%d*%d+%d=%d"%(x,x,y,my_sum(x,y))
cdef char* ret2= ret
return string( ret2 )
用 cython 编译(创建helloWorld.cpp
, helloWorld.h
):
cython --cplus helloWorld.pyx
你的代码program.cpp
:
#include <string>
#include <iostream>
#include "Python.h"
#include "helloWorld.h" // it's cpp header so remove __PYX_EXTERN_C (bug)
int main(int argc, char *argv[]) {
Py_Initialize(); //start python interpreter
inithelloWorld(); //run module helloWorld
helloWorld();
std::cout << testString("6","6") << std::endl; #it's fast!
Py_Finalize();
return 0;
}
编译并运行:
g++ program.cpp helloWorld.cpp -I/usr/include/python2.7/ -lpython2.7
./a.out
Hello World Cython!
Hello World Python!
6*6+6=42
你的代码program.cpp
:
#include <string>
#include <iostream>
#include <boost/python.hpp>
int main(int argc, char *argv[]) {
Py_Initialize();
boost::python::object sys = boost::python::import("sys");
sys.attr("path").attr("append")(".");
boost::python::object main_module = boost::python::import("yourlib");
main_module.attr("helloWorld")("boost_python");
boost::python::object ret= main_module.attr( "my_sum" )( 10, 10 );
std::cout << boost::python::extract<char const*>(ret) << std::endl;
Py_Finalize();
return 0;
}
编译并运行:
g++ program.cpp -I/usr/include/python2.7/ -lpython2.7 -lpython_boost
./a.out
Hello World boost_python!
10*10+10=110
您可能想检查如何在另一个应用程序中嵌入 python ( http://docs.python.org/extending/embedding.html )。