Add Python linkedlist (#119)

* fixed incorrect links

* added singly list Data structure

* removed semi-column

* added doubly linked list

* added  doubly linked list

* docs: update linked list index

add python double linked list in the linked list inded

Co-authored-by: Arsenic <54987647+Arsenic-ATG@users.noreply.github.com>

linked-lists/Python/doubly.py

@@ -0,0 +1,34 @@
+# A simple Python program to create a  linked list 
+  
+# Node class 
+class Node:
+   def __init__(self, data):
+      self.data = data
+      self.next = None
+      self.prev = None
+
+class doubly_linked_list:
+
+   def __init__(self):
+      self.head = None
+
+# Adding data elements		
+   def push(self, NewVal):
+      NewNode = Node(NewVal)
+      NewNode.next = self.head
+      if self.head is not None:
+         self.head.prev = NewNode
+      self.head = NewNode
+
+# Print the Doubly Linked list		
+   def listprint(self, node):
+      while (node is not None):
+         print(node.data),
+         last = node
+         node = node.next
+
+dllist = doubly_linked_list()
+dllist.push(12)
+dllist.push(8)
+dllist.push(62)
+dllist.listprint(dllist.head)

linked-lists/README.md

@@ -19,3 +19,4 @@
 
 ### Python
 1. [Singly Linked List](Python/singly.py)
+2. [Doubly Linked List](Python/doubly.py)