From 06722c48711dc01ea75be2eb15098419524513bc Mon Sep 17 00:00:00 2001
From: bt3gl <138340846+cypher-bt3gl@users.noreply.github.com>
Date: Sat, 29 Jul 2023 20:23:51 -0700
Subject: [PATCH] playing with linked lists

---
 linked_lists/linked_list-double.py | 52 ++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 linked_lists/linked_list-double.py

diff --git a/linked_lists/linked_list-double.py b/linked_lists/linked_list-double.py
new file mode 100644
index 0000000..327f1e7
--- /dev/null
+++ b/linked_lists/linked_list-double.py
@@ -0,0 +1,52 @@
+## create a doubly linked list
+
+class Node():
+
+    def __init__(self, data, previous=None):
+        self.data = data
+        self.next = None
+        self.previous = previous
+
+        self.address = self
+    
+    def insert(self, data):
+
+        while self.next:
+            self = self.next
+            node = Node(data, previous=self)
+        
+        if self.next is None:
+            node = Node(data, previous=self)
+    
+        self.next = node
+    
+
+
+if __name__ == "__main__":
+
+    ll = Node(0)
+    for n in range(1, 10):
+        ll.insert(n)
+
+    while ll.next:
+        
+        this_data = ll.data
+        this_address = ll.address
+
+        if ll.next is None:
+            this_next_data = None
+            this_next_address = None
+        else:
+            this_next_data = ll.next.data
+            this_next_address = ll.next.address
+
+        if ll.previous is None: 
+            this_previous_data = None
+            this_previous_address = None
+        else:
+            this_previous_data = ll.previous.data
+            this_previous_address = ll.previous.address
+
+
+        print(f'This node -> data: {this_data}, address: {this_address} | Previous node -> data: {this_previous_data}, address: {this_previous_address} | Next node -> data: {this_next_data}, address: {this_next_address}')
+        ll = ll.next