code: def validate_q_geo(self, value):
          
          if value:
              try:
                  rectangle = utils.parse_geo_box(value)
                  return "[{0},{1} TO {2},{3}]".format(
                      rectangle.bounds[0],
                      rectangle.bounds[1],
                      rectangle.bounds[2],
                      rectangle.bounds[3],
                  )
              except Exception as e:
                  raise serializers.ValidationError(e.message)
  
          return value
docs: Would be for example: [-90,-180 TO 90,180]