import subprocess

p = subprocess.Popen('ping www.baidu.com', shell=True, stdout=subprocess.PIPE)

out, err = p.communicate()

print out.splitlines()[24:27]

for line in out.splitlines():

    print line

# 利用python的subprocess模块执行外部命令, 并捕获stdout, stderr的输出:

# Python代码

import subprocess

# print ’popen3:’

def external_cmd(cmd, msg_in=''):

    try:

        proc = subprocess.Popen(cmd,

                                shell=True,

                                stdin=subprocess.PIPE,

                                stdout=subprocess.PIPE,

                                stderr=subprocess.PIPE,

                                )

        stdout_value, stderr_value = proc.communicate(msg_in)

        return stdout_value, stderr_value

    except ValueError as err:

        # log("ValueError: %s" % err)

        return None, None

    except IOError as err:

        # log("IOError: %s" % err)

        return None, None

if __name__ == '__main__':

    stdout_val, stderr_val = external_cmd('ls -l')

    print 'Standard Output: %s' % stdout_val

    print 'Standard Error: %s' % stderr_val

Standard Output:

Standard Error: 'ls' 不是内部或外部命令，也不是可运行的程序

或批处理文件。

Process finished with exit code 0