Remove Multiple Unused Imports and Variable

data_structures/LinkedList/DoublyLinkedList.py

@@ -24,7 +24,7 @@ class LinkedList:
         temp = self.head
         self.head = self.head.next # oldHead <--> 2ndElement(head) 
         self.head.previous = None # oldHead --> 2ndElement(head) nothing pointing at it so the old head will be removed
-        if(self.head == None):
+        if(self.head is None):
             self.tail = None
         return temp
     
@@ -58,7 +58,7 @@ class LinkedList:
             current.next.previous = current.previous # 1 <--> 3
     
     def isEmpty(self): #Will return True if the list is empty
-        return(self.head == None)
+        return(self.head is None)
         
     def display(self): #Prints contents of the list
         current = self.head

data_structures/LinkedList/__init__.py

@@ -19,4 +19,4 @@ class LinkedList:
             return item
 
     def is_empty(self):
-        return self.head == None
+        return self.head is None

data_structures/LinkedList/singly_LinkedList.py

@@ -67,3 +67,4 @@ class Linked_List:
             current = next_node
         # Return prev in order to put the head at the end
         Head = prev
+        return Head