mount command pid

Trying to mount a device and get the pid of mount command.

cmd="/bin/mount /dev/sda1 /mnt"

os.system(cmd)

Now how to obtain the pid of mount command? There plenty of mounted device avail开发者_如何学JAVAable on my system, something like ps | grep mount won't work.

---

As the comments suggest I'm not sure how useful it is to get the mount pid, but if you use the subprocess module you can easily get the pid.

>>> import subprocess
>>> p = subprocess.Popen("ls", shell=True)
>>> p.pid
4136
>>>