ch06

ch06/oop/class.self.py

@@ -0,0 +1,21 @@
+# oop/class.self.py
+class Square:
+    side = 8
+    def area(self):  # self is a reference to an instance
+        return self.side ** 2
+
+sq = Square()
+print(sq.area())  # 64 (side is found on the class)
+print(Square.area(sq))  # 64 (equivalent to sq.area())
+
+sq.side = 10
+print(sq.area())  # 100 (side is found on the instance)
+
+
+
+"""
+$ python class.self.py
+64
+64
+100
+"""