old_contents: class MapLocation:
      def __init__(self, latitude=0, longitude=0, id=0):
          if latitude > 90 or latitude < -90:
              raise ValueError("latitude must be between -90 and 90")
          if longitude > 180 or longitude < -180:
              raise ValueError("longitude must be between -180 and 180")
          self.latitude = latitude
          self.longitude = longitude
          self.id = id
  
      def __eq__(self, other):
          return self.latitude == other.latitude and \
                 self.longitude == other.longitude and \
                 self.id == other.id
  
      def __ne__(self, other):
          return not self.__eq__(other)
  
      def __lt__(self, other):
          if self.latitude == other.latitude and self.longitude == other.latitude:
              return self.id < other.id
          elif self.latitude == other.latitude:
              return self.longitude < other.longitude
          else:
              return self.latitude < other.latitude
  
      def __str__(self):
          return "{}, {}".format(self.latitude, self.longitude)
  
new_contents: class MapLocation:
      def __init__(self, latitude=0, longitude=0, id=0):
          if latitude > 90 or latitude < -90:
              raise ValueError("Error: latitude must be between -90 & 90. Latitude is %f" % float(latitude))
          if longitude > 180 or longitude < -180:
              raise ValueError("Error: longitude must be between -180 & 180. Longitude is %f" % float(longitude))
          self.latitude = latitude
          self.longitude = longitude
          self.id = id
  
      def __eq__(self, other):
          return self.latitude == other.latitude and \
                 self.longitude == other.longitude and \
                 self.id == other.id
  
      def __ne__(self, other):
          return not self.__eq__(other)
  
      def __lt__(self, other):
          if self.latitude == other.latitude and self.longitude == other.latitude:
              return self.id < other.id
          elif self.latitude == other.latitude:
              return self.longitude < other.longitude
          else:
              return self.latitude < other.latitude
  
      def __str__(self):
          return "{}, {}".format(self.latitude, self.longitude)
  
subject: improve error message for invalid long/lat