Added documentation to the Python Code

linked_list.py

@@ -1,7 +1,41 @@
+"""
+    Module for singly and doubly linked list implementations with nodes storing 2D point data.
+    Classes:
+    --------
+    Node:
+        Represents a node in a linked list, storing an index and a tuple of (x, y) coordinates.
+        Attributes:
+            index (int): The index of the node.
+            data (tuple): Tuple containing x and y integer coordinates.
+            prev (Node): Reference to the previous node (for doubly linked lists).
+            next (Node): Reference to the next node.
+    LinkedList:
+        Singly linked list implementation for storing 2D points.
+        Methods:
+            __init__(x: int, y: int): Initializes the list with a starting point.
+            append(x: int, y: int): Appends a new node with (x, y) at the end.
+            insert(index: int, x: int, y: int): Inserts a new node at the specified index.
+            delete(index: int): Deletes the node at the specified index.
+            to_list(): Returns a list of all (x, y) tuples in the list.
+            display_forward(): Prints the list from head to tail.
+    DoublyLinkedList:
+        Doubly linked list implementation for storing 2D points.
+        Methods:
+            __init__(): Initializes an empty doubly linked list.
+            append(x: int, y: int): Appends a new node with (x, y) at the end.
+            insert(index: int, x: int, y: int): Inserts a new node at the specified index.
+            delete(x: int, y: int): Deletes the first node with the specified (x, y) data.
+            reverse(): Reverses the order of the list in place.
+            find(data: tuple): Returns the index of the node with the specified data, or -1 if not found.
+            to_list(): Returns a list of all (x, y) tuples in the list.
+            display_forward(): Prints the list from head to tail.
+            display_backward(): Prints the list from tail to head.
+"""
+
 class Node:
     def __init__(self, index, x:int, y:int):
         self.index = index
-        self.data = (x, y)
+        self.data = (x, y)  # Data as points or tuples of integral x-y coordinates
         self.prev = None
         self.next = None