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