tasks a-s

Task/Polymorphism/Python/polymorphism-1.py

@@ -0,0 +1,14 @@
+class Point(object):
+    def __init__(self, x=0.0, y=0.0):
+        self.x = x
+        self.y = y
+    def __repr__(self):
+        return '<Point 0x%x x: %f y: %f>' % (id(self), self.x, self.y)
+
+class Circle(object):
+    def __init__(self, center=None, radius=1.0):
+        self.center = center or Point()
+        self.radius = radius
+    def __repr__(self):
+        return '<Circle 0x%x x: %f y: %f radius: %f>' % (
+            id(self), self.center.x, self.center.y, self.radius)