i stuck in step 21 and it show you should assign current_node.next to previous_node.next inside the elif statement.
def __init__(self):
self.length = 0
self.head = None
def is_empty(self):
return self.length == 0
def add(self, element):
node = self.Node(element)
if self.is_empty():
self.head = node
else:
current_node = self.head
while current_node.next is not None:
Your code so far
class LinkedList:
class Node:
def __init__(self, element):
self.element = element
self.next = None
def __init__(self):
self.length = 0
self.head = None
def is_empty(self):
return self.length == 0
def add(self, element):
node = self.Node(element)
if self.is_empty():
self.head = node
else:
current_node = self.head
while current_node.next is not None:
current_node = current_node.next
current_node.next = node
self.length += 1
def remove(self, element):
previous_node = None
current_node = self.head
while current_node is not None and current_node.element != element:
# User Editable Region
previous_node = current_node
current_node = current_node.next
if previous_node is None:
self.head = current_node.next
elif previous_node is not None:
previous_node.next = current_node.next
# User Editable Region
self.length -= 1
my_list = LinkedList()
print(my_list.is_empty())
my_list.add(1)
my_list.add(2)
print(my_list.is_empty())
print(my_list.length)
my_list.remove(1)
print(my_list.length)
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Challenge Information:
Build a Linked List - Step 21
Please help me to find the error in my code
