如何将数据发送到所有Epoll fds？

import select
import socket

# 创建一个Epoll实例
epoll = select.epoll()

# 创建一个服务器socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('localhost', 8888))
server_socket.listen(5)

# 将服务器socket添加到Epoll实例中
epoll.register(server_socket.fileno(), select.EPOLLIN)

# 存储所有客户端socket的字典
clients = {}

while True:
    events = epoll.poll()  # 等待事件发生
    for fileno, event in events:
        if fileno == server_socket.fileno():
            # 有新的连接请求
            client_socket, client_address = server_socket.accept()
            # 将客户端socket添加到Epoll实例中
            epoll.register(client_socket.fileno(), select.EPOLLIN)
            clients[client_socket.fileno()] = client_socket
        elif event & select.EPOLLIN:
            # 有可读事件发生，接收数据
            client_socket = clients[fileno]
            data = client_socket.recv(1024)
            if data:
                # 处理接收到的数据
                # ...
                pass
            else:
                # 客户端断开连接
                epoll.unregister(fileno)
                client_socket.close()
                del clients[fileno]
        elif event & select.EPOLLOUT:
            # 有可写事件发生，发送数据
            client_socket = clients[fileno]
            data = "Hello, client!"
            client_socket.send(data.encode())

# 关闭Epoll实例和服务器socket
epoll.close()
server_socket.close()