python中调用动态链接库（C++，linux）

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1， 创建并编译C++程序

#include <fstream>

#include <assert.h> 

#include <malloc.h> 

#include <stdlib.h>    

 

#include <math.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

 

#include <iostream> 

using namespace std;

 

extern "C" {

    int load_data(void);

        int FreeMem(void);

        char* ExtMobileLocation(char* mobile);

        。。。。。。

 

}

char* ExtMobileLocation(char* mobile)

{

       return" ; ; ";

}

 

编译命令：g++ -c element_dec.cpp

g++ -fPIC -shared element_dec.cpp -o element_dec.so

 

2， python中调用

!/usr/bin/python

#coding=utf-8

from ctypes import *

import os

import sys

import time

 

#print os.getcwd() + '/id_dec.so'

pDll=cdll.LoadLibrary(os.getcwd() +'/element_dec.so')

pDll.load_data()#加载数据需消耗一定时间

strToBeDec = sys.stdin.readline()

typeK = sys.argv[1]

start = time.clock()

records = 0

while strToBeDec:

   strKey = strToBeDec.replace("\n","").split("\t")[0]

   #print strKey

    iftypeK == "Mobile":#手机解析

       pDll.ExtMobileLocation.restype  =c_char_p

       pDll.ExtMobileLocation2.restype  =c_char_p

       #printpDll.ExtMobileLocation(strKey).decode("gbk").encode("utf-8")

       strDecResult = pDll.ExtMobileLocation2(strKey).decode("gbk").encode("utf-8")

       strPro,strCity,strCode = strDecResult.split(";")[0:3]

       print strPro+"\t"+strCity+"\t"+strCode

   records+=1  

   strToBeDec = sys.stdin.readline()

end = time.clock()

print records," records run: %f s"% (end - start)

pDll.FreeMem()

运行示例：cat dec_test_data.txt |awk -F '\t''{print $13}'|./element_dec.py Mobile