/*********************************************************************
?* Author? : Samson
?* Date? ? : 02/02/2015
?* Test platform:
?*? ? ? ? ? ? ? 3.13.0-24-generic
?*? ? ? ? ? ? ? GNU bash, 4.3.11(1)-release
?* *******************************************************************/

C共享库中存在这样的函数：

#include
#include
#include

#define true 1
#define false 0

typedef struct user_server_list{
? ? ? ? char servername[64];
? ? ? ? char server_status; /* on: true off:flase*/
? ? ? ? char server_manual_start;? /* enable: true? disable: false*/
? ? ? ? struct user_server_list *next;
}Struct_server_list, *P_Struct_server_list;

int add(int a, int b)
{
? ? ? ? int c = a + b;
? ? ? ? return c;
}

P_Struct_server_list get_server_list()
{
? ? ? ? P_Struct_server_list p = malloc(sizeof(Struct_server_list));
? ? ? ? memset(p, 0, sizeof(Struct_server_list));
? ? ? ? strcpy(p->servername, "ssh");
? ? ? ? p->server_status = true;
? ? ? ? p->server_manual_start = false;
? ? ? ? P_Struct_server_list p2 = malloc(sizeof(Struct_server_list));
? ? ? ? memset(p2, 0, sizeof(Struct_server_list));
? ? ? ? strcpy(p2->servername, "cmd");
? ? ? ? p2->server_status = true;
? ? ? ? p2->server_manual_start = false;
? ? ? ? p->next = p2;
? ? ? ? p2->next = NULL;
? ? ? ? return p;
}

使用gcc -g -fPIC -shared -o libhelloworld.so.0.0.0 test.c编译成动态库；

然后编写python调用程序，代码如下：

#!/bin/env python?
# coding=UTF-8

from ctypes import *
class StructPointer(Structure):
? ? ? ? pass

StructPointer._fields_=[("servername", c_char * 64), ("server_status", c_char), ("server_manual_start", c_char), ("next", POINTER(StructPointer))]

lib = cdll.LoadLibrary('./libhelloworld.so.0.0.0')
lib.get_server_list.restype = POINTER(StructPointer)

p = lib.get_server_list()
print p.contents.servername
p2=p.contents.next[0]
print p2.servername

执行结果为：

linuxidc@linuxidc:~$ python testpython.py
ssh
cmd