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