def deduplicate_regions(region, dup_region):
 cities = dup_region.city_set.all()
 if cities.exists():
  cities.update(region=region)
 users = dup_region.userprofile_set.all()
 if users.exists():
  users.update(geo_region=region)
 dup_region.delete()

def deduplicate_regions ( region , dup_region ) : cities = dup_region . city_set . all ( ) if cities . exists ( ) : cities . update ( region = region ) users = dup_region . userprofile_set . all ( ) if users . exists ( ) : users . update ( geo_region = region ) dup_region . delete ( )
given 2 country instances .