'How can I search a value of a node given a linked list

I'm relatively new to python so please excuse me if my question is simple. I've been given a task to create a function that returns the value of a node in a given Linked list and I'm quite confused about where to start and would appreciate any help

def search(tree, search_value):
   queue = LinkedList()
   queue.append(tree.head)

where the linked list class includes methods such as append, insert, pop, delete, get_length, get_node and get_value

Thank you



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