pop3 mail download - using python.org example

[Kevin F]

i'm trying to this this code to access my pop server but it only prompts 
for a password and not a username, how do i get it to ask for my 
username as well?


##from http://docs.python.org/lib/pop3-example.html

import getpass, poplib

M = poplib.POP3('localhost')
M.user(getpass.getuser())
M.pass_(getpass.getpass())
numMessages = len(M.list()[1])
for i in range(numMessages):
     for j in M.retr(i+1)[1]:
         print j