用线性表实现一个通讯录

使用线性表（如数组、链表等数据结构）实现通讯录通常涉及到创建一个可以存储联系人信息的数据结构，每个联系人都包含姓名、电话号码、电子邮件等基本信息。下面是一个简单的示例，假设我们使用链表作为基础：

1. 定义一个联系人的数据结构，例如`Contact`类：

class Contact:
    def __init__(self, name, phone_number, email):
        self.name = name
        self.phone_number = phone_number
        self.email = email

2. 创建一个`ContactList`类，使用链表存储联系人：

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

    def __init__(self):
        self.head = self.Node()

    def add_contact(self, contact):
        new_node = self.Node(contact)
        if not self.head.contact:
            self.head = new_node
        else:
            current = self.head
            while current.next:
                current = current.next
            current.next = new_node

    def find_contact(self, name):
        current = self.head
        while current and current.contact.name != name:
            current = current.next
        return current.contact if current else None

    def search(self, keyword):
        result = []
        current = self.head
        while current:
            if keyword in current.contact.name or \
               keyword in current.contact.phone_number or \
               keyword in current.contact.email:
                result.append(current.contact)
            current = current.next
        return result