It's been a while since you posted, so you've probably found your answer. But, just in case you haven't, here you go.
There are a few different ways to do it, depending on what you need. Check out the python documentation on their usage, etc. They are all from the os module:
os.system('<your command'>. It will just execute the command and return an exit status.
The os.exec* variants and the os.spawn* variants. Read about them
here.
Hope that helps!!!