def lookup_scopes(service_name):
  """Finds the scope URLs for the desired service.
  
  In some cases, an unknown service may be used, and in those cases this
  function will return None.
  """
  if CLIENT_LOGIN_SCOPES in service_name:
    return CLIENT_LOGIN_SCOPES[service_name]
  return None
    

# Module level variable specifies which module should be used by GDataService
# objects to make HttpRequests. This setting can be overridden on each 
# instance of GDataService.
# This module level variable is deprecated. Reassign the http_client member
# of a GDataService object instead.
dataset/ETHPy150Open bradfitz/addressbooker/gdata/service.py/lookup_scopes/swapped operands of `in`