PythonProgramming/LinkedList.py at main · sanghunkim20/PythonProgramming · GitHub

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

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

    def append(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            return
        last_node = self.head
        while last_node.next:
            last_node = last_node.next
        last_node.next = new_node

    def prepend(self, data):
        new_node = Node(data)
        new_node.next = self.head
        self.head = new_node

    def delete(self, data):
        current_node = self.head
        if current_node and current_node.data == data:
            self.head = current_node.next
            current_node = None
            return
        prev_node = None
        while current_node and current_node.data != data:
            prev_node = current_node
            current_node = current_node.next
        if current_node is None:
            return
        prev_node.next = current_node.next
        current_node = None

    def display(self):
        current_node = self.head
        while current_node:
            print(current_node.data, end=' ')
            current_node = current_node.next
        print()

# 테스트
if __name__ == "__main__":
    linked_list = LinkedList()
    linked_list.append(1)
    linked_list.append(2)
    linked_list.append(3)
    linked_list.append(4)
    linked_list.prepend(0)
    linked_list.display()  # 출력: 0 1 2 3 4
    linked_list.delete(1)
    linked_list.display()  # 출력: 0 2 3 4