Trying to run a sudo command from script

[Kent Tenney]

Howdy,

A script running as a regular user sometimes wants
to run sudo commands.

It gets the password with getpass.
pw = getpass.getpass()

I've fiddled a bunch with stuff like
proc = subprocess.Popen('sudo touch /etc/foo'.split(), stdin=subprocess.PIPE)
proc.communicate(input=pw)

getting assorted errors with all variations I try.

Googling says use pexpect, but I'd prefer a stdlib solution.

Any help appreciated.

Thanks,
Kent