[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

data_structures/linked_list/add_node.py

@@ -1,44 +1,52 @@
 class Node:
-    def __init__(self,data:int)->None:
-        self.data=data
-        self.ref= None 
+    def __init__(self, data: int) -> None:
+        self.data = data
+        self.ref = None
+
+
 class LinkedList:
-    def __init__(self)->None:
-        self.head=None
+    def __init__(self) -> None:
+        self.head = None
+
     def print_ll(self):
         if self.head is None:
             print("The Linked List is empty ")
         else:
-            n= self.head
+            n = self.head
             while n is not None:
                 print(n.data)
-                n=n.ref
-    def add_begin(self,data:int)->None:
-        new_node= Node(data)
-        new_node.ref= self.head
-        self.head = new_node 
-    def add_end(self,data:int)->None:
-        new_node= Node(data)
+                n = n.ref
+
+    def add_begin(self, data: int) -> None:
+        new_node = Node(data)
+        new_node.ref = self.head
+        self.head = new_node
+
+    def add_end(self, data: int) -> None:
+        new_node = Node(data)
         if self.head is None:
-            self.head=new_node
+            self.head = new_node
         else:
-            n=self.head
+            n = self.head
             while n.ref is not None:
-                n=n.ref
-            n.ref=new_node
-    def add_after(self,data:int,target_value:int)->None:
-        n=self.head
+                n = n.ref
+            n.ref = new_node
+
+    def add_after(self, data: int, target_value: int) -> None:
+        n = self.head
         while n is not None:
-            if target_value==n.data:
+            if target_value == n.data:
                 break
-            n=n.ref
-        new_node=Node(data)
-        new_node.ref= n.ref
-        n.ref= new_node 
-linked_list= LinkedList()
+            n = n.ref
+        new_node = Node(data)
+        new_node.ref = n.ref
+        n.ref = new_node
+
+
+linked_list = LinkedList()
 linked_list.add_begin(11)
 linked_list.add_end(100)
 linked_list.add_begin(22)
-linked_list.add_after(30,11)
+linked_list.add_after(30, 11)
 linked_list.print_ll()
-#https://youtu.be/xRTdfZsAz6Y?si=EMrqVJpXjDDz1kEF
+# https://youtu.be/xRTdfZsAz6Y?si=EMrqVJpXjDDz1kEF