[Tutor] how to get response from os.system()

[Luke Paireepinart]

Nathan McBride wrote:
> Would you mind perhaps show an example running an interactive command like su and show how to send input to the commands waiting propmts?
Using the subprocess module, open a command and save the stdin and 
stdout pipes as variables.  Then write to the stdin to send data to the 
program, and read from stdout to get data from it.