Python调用C/C++的种种方法

bestu

　　Python是解释性语言, 底层就是用c实现的, 所以用python调用C是很容易的, 下面就总结一下各种调用的方法, 给出例子,  所有例子都在ubuntu9.10, python2.6下试过.
　　1. Python 调用 C (base)  
　　想在python中调用c函数, 如这儿的fact
　　#include
int fact(int n)
{
  if (n > import hello
>>> hello.greet()
'hello, world'
　　
　　4. python 调用 c++ (ctypes)  
　　ctypes is an  advanced ffi (Foreign Function Interface) package for Python 2.3 and higher. In Python 2.5 it is already included.
　　ctypes allows to call functions in dlls/shared libraries and has extensive  facilities to create, access and manipulate simple and complicated C data types  in Python - in other words: wrap libraries in pure Python. It is even possible  to implement C callback functions in pure Python.
　　http://python.net/crew/theller/ctypes/
　　#include
class TestFact{
    public:
     TestFact(){};
    ~TestFact(){};
    int fact(int n);
};
int  TestFact::fact(int n)
{
  if (n >> import ctypes
>>> pdll =  ctypes.CDLL('/home/ubuntu/tmp/example.so')
>>>  pdll.fact(4)
12