Nombre: Userpwd.py
Autor: James Knowlton
Descripción: Comprueba identificadores de usuario y contraseñas para el cumplimiento de políticas de seguridad
Visto en Developer Works

#!/usr/bin/python

import pwd

#initialize counters
erroruser = []
errorpass = []

#get password database
passwd_db = pwd.getpwall()

try:
    #check each user and password for validity
    for entry in passwd_db:
        username = entry[0]
        password = entry [1]
        if len(username) < 6:
            erroruser.append(username)
        if len(password) < 8:
            errorpass.append(username)

    #print results to screen
    print "The following users have an invalid userid (less than six characters):"
    for item in erroruser:
        print item
    print "\nThe following users have invalid password(less than eight characters):"
    for item in errorpass:
        print item
except:
    print "There was a problem running the script."