以上代码利用os.popen()指令获取了控制台的输出内容。

结果示例：

参考：用Python获取命令行输出

PEP324标准中，提出了用subprocess模块取代os.system和os.popen等函数的功能。在实践中，subprocess模块也比os.popen等函数有更好的表现，特别是在多线程开发中。

该模块中最重要的类是Popen类

常用的参数：

args should be a string, or a sequence of program arguments. The program to execute is normally the first item in the args sequence or string, but can be explicitly set by using the executable argument.

stdin, stdout and stderr specify the executed programs' standard input, standard output and standard error file handles, respectively. Valid values are PIPE, an existing file descriptor (a positive integer), an existing file object, and None. PIPE indicates that a new pipe to the child should be created. With None, no redirection will occur; the child's file handles will be inherited from the parent. Additionally, stderr can be STDOUT, which indicates that the stderr data from the applications should be captured into the same file handle as for stdout.

If shell is true, the specified command will be executed through the shell.

If cwd is not None, the current directory will be changed to cwd before the child is executed. ( cwd means current working directory)

If env is not None, it defines the environment variables for the new process.

常用的方法：

poll(): Check if child process has terminated. Returns returncode attribute.

wait(): Wait for child process to terminate. Returns returncode attribute.

communicate(input=None) Interact with process: Send data to stdin. Read data from stdout and stderr, until end-of-file is reached. Wait for process to terminate. The optional stdin argument should be a string to be sent to the child process, or None, if no data should be sent to the child.

communicate() returns a tuple (stdout, stderr).

Note: The data read is buffered in memory, so do not use this method if the data size is large or unlimited.

如果用subprocess模块实现第一节的功能，代码如下：

输出：

在上面的示例代码中，我们注意到，代码最后一行使用了GBK格式解码。我们是怎样确定解码的格式的呢？

参考 python使用subprocess获取命令行输入后中文转码问题

subprocess的输出格式与命令行的输出格式一致，而命令行的输出格式可以按照如下方式查询：

在命令行执行chcp指令，得到活动页代码。比如，在我的电脑中执行结果如下所示。

然后依照下表查询可得字符集编码。

MS-DOS为以下国家和语言提供字符集： 　　代码页描述 　　1258 越南语 　　1257 波罗的语 　　1256 阿拉伯语 　　1255 希伯来语 　　1254 土耳其语 　　1253 希腊语 　　1252 拉丁 1 字符 (ANSI) 　　1251 西里尔语 　　1250 中欧语言 　　950 繁体中文 　　949 朝鲜语 　　936 简体中文（默认） GBK 　　932 日语 　　874 泰国语 　　850 多语种 (MS-DOS Latin1) 　　437 MS-DOS 美国英语 　　65001 UTF-8