* Updated 28-classmethod-2.py

Vimal · Vimal · commit 7e881dd5409e · 2016-06-13T01:55:25.000+05:30
diff --git a/28-classmethod-2.py b/28-classmethod-2.py
@@ -1,13 +1,43 @@
 #!/usr/bin/env python
 
-# 27-classmethod-1.py
+# 28-classmethod-2.py
 
 # Classmethods are decorators which are inbuilt in Python.
 # We decorate a function as a classemethod using the decorator
 # @classmethod.
 
-# Class methods are used for functions which need not be 
+# Class methods are used for functions which need not be
 # called via an instance. Certain use cases may be:
 
 # a) Creating instances take resources, hence the methods/functions
-# which need necessarily 
+# which need necessarily
+
+
+class InstanceCounter(object):
+    count = 0
+
+    def __init__(self, val):
+        self.val = val
+        InstanceCounter.count += 1
+
+    def set_val(self, newval):
+        self.val = newval
+
+    def get_val(self):
+        return self.val
+
+    @classmethod
+    def get_count(cls):
+        return cls.count
+
+a = InstanceCounter(10)
+print("\nValue of object : %s" % a.get_val())
+print(InstanceCounter.get_count())
+
+b = InstanceCounter(20)
+print("\nValue of object : %s" % b.get_val())
+print(InstanceCounter.get_count())
+
+c = InstanceCounter(40)
+print("\nValue of object : %s" % c.get_val())
+print(InstanceCounter.get_count())
