用Python获取命令行输出 将屏幕输出的log保存文件中

# -*- coding:utf-8 -*-import oscommand = 'ping www.baidu.com '#可以直接在命令行中执行的命令r = os.popen(command)info = r.readlines()for line in info:    line = line.strip('\r\n')    if isinstance(line, unicode):        cnstr = line.encode('utf-8')    else:        cnstr = line.decode('cp936').encode('utf-8')
    print cnstr
参考：http://blog.sina.com.cn/s/blog_6a6c136d0102v4zx.html
http://www.cnblogs.com/liu-ke/p/5092274.html