code: def prompt_user_passwd(self, host, realm):
          
          import getpass
          try:
              user = input("Enter username for %s at %s: " % (realm, host))
              passwd = getpass.getpass("Enter password for %s in %s at %s: " %
                  (user, realm, host))
              return user, passwd
          except KeyboardInterrupt:
              print()
              return None, None
docs: Override this in a GUI environment!