print example polymorphism

python-temel/print.example.py

@@ -0,0 +1,9 @@
+class Sample:
+    def __init__(self, val):
+        self.val = val
+
+    def __str__(self):
+        return 'Sample object, value = {}'.format(self.val)
+
+s = Sample(100)
+print(s)