<commit_before>class Node():
    def __init__(self, data):
        self.data = data
        self.next = None


class LinkedList():
    def __init__(self):
        self.head = None
        self.tail = 0
        self.size = 0<commit_msg>added method to insert node into linked list<commit_after>class Node():
    def __init__(self, data):
        self.data = data
        self.next = None


class LinkedList():
    def __init__(self):
        self.head = None
        self.tail = 0
        self.size = 0

    def insert_node(self, data):
        inserted_node = Node(data)
        inserted_node.next = self.head
        self.head = inserted_node
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{'dir': 'git-commits-cleaned', 'id': '862766', 'n_tokens_mistral': 196, 'n_tokens_neox': 190, 'n_words': 53}