import smtplib
import subprocess
import string

p = subprocess.Popen("df -h", shell=True, stdout=subprocess.PIPE)
MSG = p.stdout.read()
FROM = "guru-python-sysadmin@example.com"
TO = "staff@example.com"
SUBJECT = "Nightly Disk Usage Report"
msg = string.join((
    "From: %s" % FROM,
    "To: %s" % TO,
    "Subject: %s" % SUBJECT,
    "",
    MSG), "\r\n")
server = smtplib.SMTP('localhost')
server.sendmail(FROM, TO, msg)
server.quit()