doubly linked list

Author: raianmol172

doubly linked list.py

@@ -0,0 +1,51 @@
+class Node:
+    def __init__(self, data):
+        self.data = data
+        self.next = None
+        self.prev = None
+
+
+class DoublyLinkedList:
+    def __init__(self):
+        self.head = None
+
+    def printList(self):
+        temp = self.head
+        while temp:
+            print(temp.data)
+            temp = temp.next
+
+    def append(self, data):
+        if not self.head:
+            new_node = Node(data)
+            new_node.prev = None
+            self.head = new_node
+        else:
+            new_node = Node(data)
+            temp = self.head
+            while temp.next:
+                temp = temp.next
+            temp.next = new_node
+            new_node.prev = temp
+            new_node.next = None
+
+    def prepend(self, data):
+        if not self.head:
+            new_node = Node(data)
+            new_node.prev = None
+            self.head = new_node
+        else:
+            new_node = Node(data)
+            self.head.prev = new_node
+            new_node.next = self.head
+            self.head = new_node
+            new_node.prev = None
+
+
+if __name__ == '__main__':
+
+    dlist = DoublyLinkedList()
+    dlist.append(10)
+    dlist.append(20)
+    dlist.prepend(30)
+    dlist.printList()