new_contents: """Constants for the IOS-XR driver."""
  
  from __future__ import unicode_literals
  
  from napalm_base.constants import *  # noqa
  
  SR_638170159_SOLVED = False
  # this flag says if the Cisco TAC SR 638170159
  # has been solved
  #
  # "XML Agent Does not retrieve correct BGP routes data"
  # is a weird bug reported on 2016-02-22 22:54:21
  # briefly, all BGP routes are handled by the XML agent
  # in such a way they have the following details:
  #
  # - all neighbors are 0.0.0.0
  # - all routes are 0.0.0.0/0
  # - all RD = 0000000000000000
  #
  # because of this none of the data retrieved
  # from the BGP oper is usable thus has direct implications
  # in our implementation of `get_route_to` when retrieving
  # the BGP protocol specific attributes.
  
subject: Define constants module