do sudo su - user in python script

[Gribouillis]

I have an old snippet in my notes:

import getpass
import subprocess as sp
COMMAND = ['ls']
mypass = getpass.getpass('This needs administrator privileges: ')

proc = sp.Popen(['sudo', '-kS'] + COMMAND, stdin=sp.PIPE, stdout=sp.PIPE, stderr=sp.PIPE)
proc.stdin.write(mypass + '\n')
o, e = proc.communicate()

if proc.recurncode:
    print('command failed')
else:
    print('success')
print(o)
print(e)