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python文件支持中文

# -*- coding: UTF-8 -*-

執(zhí)行shell命令

from subprocess import Popen, PIPE

def run_cmd(cmd):

#Popen call wrapper.return (code, stdout, stderr)

child = Popen(cmd, stdin = PIPE, stdout = PIPE, stderr = PIPE, shell = True)

out, err = child.communicate()

ret = child.wait()

return (ret, out, err)

獲取當(dāng)前python腳本文件所在路徑

import os

os.path.split(os.path.realpath(__file__))[0]

json模塊 import的問題

try :

import json

except :

import simplejson as json

使用json工具格式化json

#python 2.7以下

echo ＼'{＼"hello＼":1}＼' | python -m simplejson.tool

#python 2.7及以上

echo ＼'{＼"hello＼":1}＼' | python -m json.tool

一般調(diào)用步驟

Py_Initialize(); //初始化Python環(huán)境

PyImport_ImportModule("test"); // 載入python模塊

PyObject_GetAttrString(g_pModule,"test1"); //獲得相應(yīng)Python函數(shù)的PyObject

PyObject_CallFunction(test1,"i,s",2,e); //調(diào)用Python相應(yīng)的函數(shù)

Py_Finalize(); //結(jié)束

C語言的示例代碼

#include <python2.7/Python.h>

int main(){

PyObject * g_pModule = NULL;

Py_Initialize(); //使用python之前，要調(diào)用Py_Initialize();這個(gè)函數(shù)進(jìn)行初始化

if (!Py_IsInitialized())

{

printf("init error＼n");

return -1;

}

PyRun_SimpleString("import sys");

PyRun_SimpleString("sys.path.append('./')");

g_pModule =PyImport_ImportModule("mytest");//這里是要調(diào)用的文件名,我們這里是當(dāng)前目錄下test.py

if (!g_pModule) {

printf("Cant open python file!＼n");

return -2;

}

PyObject * test1 = PyObject_GetAttrString(g_pModule,"test1");//這里是要調(diào)用的函數(shù)名

PyObject *objResult = PyObject_CallFunction(test1,"i,s",2,e);//調(diào)用函數(shù)

if (!objResult){

printf("invoke function fail＼n");

}

PyObject * test2= PyObject_GetAttrString(g_pModule,"test2");//這里是要調(diào)用的函數(shù)名

objResult = PyObject_CallFunction(test2,"i",2);//調(diào)用函數(shù)

char * x = PyString_AsString(objResult);

printf("%s＼n",x);

Py_Finalize();//調(diào)用Py_Finalize，這個(gè)跟Py_Initialize相對(duì)應(yīng)的。

}

Python程序mytest.py

def test1(s,str):

print s+str

return 0

def test2(s):

return s

C程序的編譯方法

#假設(shè)我們的python編譯的時(shí)候安裝在/opt/python里，那么我們可以用這樣的命令來編譯程序

$gcc -I/opt/python/include -L/opt/python/lib/ -lpython2.7 test.c

注意: 這里要求python編譯的時(shí)候，需要有動(dòng)態(tài)鏈接庫即加上--enable-shared

./configure --prefix=/opt/python --enable-shared

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