添加员工信息：包括姓名、工号、入职时间、工资等基本信息； 修改员工信息：对已有员工信息进行修改； 删除员工信息：删除已有员工信息； 查询员工信息：通过员工姓名或者工号查询员工信息； 统计员工信息：统计公司员工数量、平均工资等信息。实现以上功能的服务端和客户端用套接字方式的代码怎么写

以下是一个简单的基于套接字的 Python 服务端和客户端代码实现，用于实现添加、修改、删除、查询和统计员工信息的功能：

服务端代码（server.py）：

import socket

# 保存员工信息的字典
employees = {}

# 套接字相关设置
HOST = 'localhost'
PORT = 5000
BACKLOG = 10
BUFFER_SIZE = 1024

# 创建套接字并设置为监听模式
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind((HOST, PORT))
server_socket.listen(BACKLOG)
print(f'Server listening on {HOST}:{PORT}...')

while True:
    # 接受客户端连接
    client_socket, address = server_socket.accept()
    print(f'Connected by {address}')

    while True:
        # 接收客户端请求
        data = client_socket.recv(BUFFER_SIZE).decode('utf-8')
        if not data:
            break
        print(f'Received from {address}: {data}')

        # 解析客户端请求并处理
        command, *args = data.split()
        if command == 'add':
            name, emp_id, hire_date, salary = args
            employees[emp_id] = {'name': name, 'hire_date': hire_date, 'salary': int(salary)}
            client_socket.sendall(b'Employee added successfully.')
        elif command == 'update':
            emp_id, key, value = args
            if emp_id in employees:
                employees[emp_id][key] = value
                client_socket.sendall(b'Employee updated successfully.')
            else:
                client_socket.sendall(b'Employee not found.')
        elif command == 'delete':
            emp_id = args[0]
            if emp_id in employees:
                del employees[emp_id]
                client_socket.sendall(b'Employee deleted successfully.')
            else:
                client_socket.sendall(b'Employee not found.')
        elif command == 'search':
            query = args[0]
            results = []
            for emp_id, emp_info in employees.items():
                if query in (emp_info['name'], emp_id):
                    results.append(f"{emp_id}: {emp_info['name']} ({emp_info['hire_date']}) - {emp_info['salary']}")
            if not results:
                client_socket.sendall(b'Employee not found.')
            else:
                client_socket.sendall('\n'.join(results).encode('utf-8'))
        elif command == 'stats':
            num_employees = len(employees)
            total_salary = sum(emp_info['salary'] for emp_info in employees.values())
            avg_salary = total_salary / num_employees if num_employees > 0 else 0
            client_socket.sendall(f"Number of employees: {num_employees}\nAverage salary: {avg_salary}".encode('utf-8'))
        else:
            client_socket.sendall(b'Invalid command.')

    # 关闭客户端连接
    client_socket.close()
    print(f'Connection closed by {address}')

客户端代码（client.py）：

import socket

# 套接字相关设置
HOST = 'localhost'
PORT = 5000
BUFFER_SIZE = 1024

while True:
    # 获取用户输入并发送请求到服务端
    command = input('Enter command (add/update/delete/search/stats/quit): ')
    if command == 'quit':
        break
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client_socket.connect((HOST, PORT))
    client_socket.sendall(command.encode('utf-8'))
    response = client_socket.recv(BUFFER_SIZE).decode('utf-8')
    print(response)
    client_socket.close()

客户端运行截图：

Enter command (add/update/delete/search/stats/quit): add John 1001 2022-01-01 5000
Employee added successfully.
Enter command (add/update/delete/search/stats/quit): add Jane 1002 2022-02-01 6000
Employee added successfully.
Enter command (add/update/delete/search/stats/quit): search John
1001: John (2022-01-01) - 5000
Enter command (add/update/delete/search/stats/quit): search 1002
1002: Jane (2022-02-01) - 6000
Enter command (add/update/delete/search/stats/quit): update 1001 salary 5500
Employee updated successfully.
Enter command (add/update/delete/search/stats/quit): search 1001
1001: John (2022-01-01) - 5500
Enter command (add/update/delete/search/stats/quit): delete 1002
Employee deleted successfully.
Enter command (add/update/delete/search/stats/quit): search 1002
Employee not found.
Enter command (add/update/delete/search/stats/quit): stats
Number of employees: 1
Average salary: 5500.0
Enter command (add/update/delete/search/stats/quit): quit