print example polymorphism 3

python-temel/print.example.3.py

@@ -0,0 +1,11 @@
+class Date:
+    def __init__(self, day, month, year):
+        self.day = day
+        self.month = month
+        self.year = year
+
+    def __str__(self):
+        return '{}/{}/{}'.format(self.day, self.month, self.year)
+
+d = Date(10, 12, 2008)
+print(d)