Update Queue.py

Python implementation DataStructures/Queue.py

@@ -1,22 +1,33 @@
+#List Based Implementation Of Queue in Python.
+
+
+#Defining a python Class named Queue.
+
+# isEmpty -> Returns True or False.
+# enqueue -> Enter the element in Queue.
+# dequeue -> Remove the element from Queue.
+# size    -> Returns the size of Queue
+
 class Queue:
 
-   	def __init__(self):
+   def __init__(self):
 	    self.items = []
 
-    def isEmpty(self):
+   def isEmpty(self):
 	    return self.items == []
 
-    def enqueue(self, item):
+   def enqueue(self, item):
 	    self.items.insert(0,item)
 
-    def dequeue(self):
+   def dequeue(self):
         return self.items.pop()
 
-    def size(self):
+   def size(self):
         return len(self.items)
 
 
 q=Queue()
+#Create an object of Class Queue
 
 q.enqueue(4)
 q.enqueue('dog')