structural design pattern

composite.py

@@ -0,0 +1,57 @@
+"""app.coordinates.py"""
+from abc import ABCMeta, abstractmethod
+
+
+class Location(metaclass=ABCMeta):
+
+    def __init__(self, latitude, longitude):
+            """implement"""
+
+    def serialize(self):
+        """implement"""
+
+    def __str__(self):
+        """implement"""
+
+class Coordinates(Location):
+    """
+    A position on earth using decimal coordinates (latitude and longitude).
+    """
+
+    def __init__(self, latitude, longitude):
+        self.latitude = latitude
+        self.longitude = longitude
+
+
+    def serialize(self):
+        """
+        Serializes the coordinates into a dict.
+
+        :returns: The serialized coordinates.
+        :rtype: dict
+        """
+        return {"latitude": self.latitude, "longitude": self.longitude}
+
+    def __str__(self):
+        return "lat: %s, long: %s" % (self.latitude, self.longitude)
+
+
+class history(Location):
+      def __init__(self, latitude, longitude):
+          self.latitude = latitude
+          self.longitude = longitude
+          self.hisLocations = []
+
+      def add(self, hisLocation):
+          self.hisLocations.append(hisLocation)
+          self.latitude += hisLocation.latitude
+          self.longitude += hisLocation.longitude
+
+
+      def serialize(self):
+          for hisLocation in self.hisLocations:
+               hisLocation.serialize
+          return {"Total longitude": self.longitude, "Total latitude": self.latitude}
+
+      def __str__(self):
+          return "lat: %s, long: %s" % (self.latitude, self.longitude)