added linked list code

Searching-algo/linked-list.py

@@ -0,0 +1,50 @@
+# A simple Python program to introduce a linked list 
+
+# Node class 
+class Node: 
+
+    # Function to initialise the node object 
+    def __init__(self, data): 
+        self.data = data  # Assign data 
+        self.next = None  # Initialize next as null 
+
+
+# Linked List class contains a Node object 
+class LinkedList: 
+
+    # Function to initialize head 
+    def __init__(self): 
+        self.head = None
+
+
+# Code execution starts here 
+if __name__=='__main__': 
+
+    # Start with the empty list 
+    llist = LinkedList() 
+
+    llist.head = Node(1) 
+    second = Node(2) 
+    third = Node(3) 
+
+    ''' 
+    Three nodes have been created. 
+    We have references to these three blocks as head, 
+    second and third 
+
+    '''
+
+    llist.head.next = second; # Link first node with second  
+
+    ''' 
+    Now next of first Node refers to second.  So they 
+    both are linked. 
+    '''
+
+    second.next = third; # Link second node with the third node 
+
+    ''' 
+    Now next of second Node refers to third.  So all three 
+    nodes are linked. 
+
+    '''