基本要求： （1）实现单链表的创建；（2）实现单链表的插入；（3）实现单链表的删除 （4）实现单链表的查找；（5）实现单链表的显示；

以下是Python实现单链表的代码： ```python class Node: def __init__(self, data=None): self.data = data self.next = None class LinkedList: def __init__(self): self.head = None # 创建单链表 def create(self, data_list): for data in data_list: self.insert(data) # 插入节点 def insert(self, data): new_node = Node(data) if self.head is None: self.head = new_node else: curr_node = self.head while curr_node.next is not None: curr_node = curr_node.next curr_node.next = new_node # 删除节点 def delete(self, data): if self.head is None: return if self.head.data == data: self.head = self.head.next return curr_node = self.head while curr_node.next is not None: if curr_node.next.data == data: curr_node.next = curr_node.next.next return curr_node = curr_node.next # 查找节点 def search(self, data): curr_node = self.head while curr_node is not None: if curr_node.data == data: return True curr_node = curr_node.next return False # 显示单链表 def display(self): curr_node = self.head while curr_node is not None: print(curr_node.data, end=' ') curr_node = curr_node.next print() ``` 其中，Node类表示单链表中的节点，LinkedList类表示单链表。create方法用于创建单链表，insert方法用于插入节点，delete方法用于删除节点，search方法用于查找节点，display方法用于显示单链表。可以通过以下代码测试： ```python # 创建单链表 llist = LinkedList() llist.create([1, 2, 3, 4, 5]) # 显示单链表 llist.display() # 1 2 3 4 5 # 插入节点 llist.insert(6) llist.display() # 1 2 3 4 5 6 # 删除节点 llist.delete(3) llist.display() # 1 2 4 5 6 # 查找节点 print(llist.search(4)) # True print(llist.search(7)) # False ```