第一种、Python调用C动态链接库(利用ctypes)
下面示例在linux或unix下可行。
pycall.c
/***gcc -o libpycall.so -shared -fPIC pycall.c*/
#include <stdio.h>
#include <stdlib.h>
int foo(int a, int b)
{
printf("you input %d and %d\n", a, b);
return a+b;
}
pycall.py
import ctypes
ll = ctypes.cdll.LoadLibrary
lib = ll("./libpycall.so")
lib.foo(1, 3)
print '***finish***'
运行方法:
gcc -o libpycall.so -shared -fPIC pycall.c
python pycall.py
第2种、Python调用C++(类)动态链接库(利用ctypes)
pycallclass.cpp
#include <iostream>
using namespace std;
class TestLib
{
public:
void display();
void display(int a);
};
void TestLib::display() {
cout<<"First display"<<endl;
}
void TestLib::display(int a) {
cout<<"Second display:"<<a<<endl;
}
extern "C" {
TestLib obj;
void display() {
obj.display();
}
void display_int() {
obj.display(2);
}
}
pycallclass.py
import ctypes
so = ctypes.cdll.LoadLibrary
lib = so("./libpycallclass.so")
print 'display()'
lib.display()
print 'display(100)'
lib.display_int(100)
运行方法:
g++ -o libpycallclass.so -shared -fPIC pycallclass.cpp
python pycallclass.py
第3种、Python调用C和C++可执行程序
main.cpp
#include <iostream>
using namespace std;
int test()
{
int a = 10, b = 5;
return a+b;
}
int main()
{
cout<<"---begin---"<<endl;
int num = test();
cout<<"num="<<num<<endl;
cout<<"---end---"<<endl;
}
main.py
import commands
import os
main = "./testmain"
if os.path.exists(main):
rc, out = commands.getstatusoutput(main)
print 'rc = %d, \nout = %s' % (rc, out)
print '*'*10
f = os.popen(main)
data = f.readlines()
f.close()
print data
print '*'*10
os.system(main)
运行方法(只有这种不是生成.so然后让python文件来调用):
g++ -o testmain main.cpp
python main.py
疑问:
Windows 如何实现?
REF
https://www.jb51.net/article/165362.htm