subprocess

subprocess.check_output()

subprocess.check_output([project_backup_data[project]], shell=True, timeout=1800)

• 列表：就是命令
• shell：用shell来执行命令，不然很多特殊的符号无法使用例如管道、&&等
• timeout：超时时间

如果命令执行错误，或者超时的话，需要捕获两个异常

except subprocess.CalledProcessError as e:
    print('备份出现异常: {}'.format(str(e)))
except subprocess.TimeoutExpired as e:
    print('备份出现超时: {}'.format(str(e)))

subprocess.Popen()

必须要res.communicate()后才能获取返回码

In [30]: import subprocess
In [31]:from subprocess import PIPE
In [32]: res = subprocess.Popen('jps rmi://10.0.0.7:2011',shell=True, stdout=PIPE, stderr=PIPE)
In [33]: out,err = res.communicate()
In [36]: res.returncode
Out[36]: 1