try:

      import krbV

  except ImportError:  # pragma: no cover

      krbV = None

  try:

      import librepo

      import io

  except ImportError:

              quit("Error: Unable to log in. Bad credentials?")

          except six.moves.xmlrpc_client.ProtocolError:

              quit("Error: Unable to connect to server %s" % (options.server))

          krb_principal = options.krb_principal

          if krb_principal is None:

              krb_principal = options.host_principal_format % socket.getfqdn()

              session.krb_login(principal=krb_principal,

                                keytab=options.keytab,

                                ccache=options.ccache)

          except socket.error as e:

              quit("Could not connect to Kerberos authentication service: '%s'" % e.args[1])

      else: