Python套接字聊天：第二个客户端连接时，第一个客户端不会发送消息

Question

我正在尝试使用python socket lib进行聊天。当第一个客户端连接到服务器时，它可以正常工作，但是当第二个客户端连接时，第一个客户端将不再向服务器发送消息，但仍会接收客户端2消息。

服务器端代码：

import socket
import threading

class Server:
    def __init__(self, port, address):
        self.port = port
        self.address = address
        self.connections = []
        self.threads = []
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    def handler_connection(self, connection, client_address):
        while True:            
            data = connection.recv(1024)
            for connection in self.connections:
                connection.send(bytes(data))
            if not data:
                self.connections.remove(connection)
                connection.close()
                break

    def run(self):
        self.sock.bind((self.address, self.port))
        self.sock.listen(1)
        print('SERVER LISTENING!\naddress: {}\nport {}'.format(self.address, self.port))

    def start(self):
        while True:
            connection, client_address = self.sock.accept()
            c_thread = threading.Thread(target=self.handler_connection, args=(connection, client_address))
            c_thread.daemon = True
            self.threads.append(c_thread)
            c_thread.start()
            self.connections.append(connection)
            print(self.connections)

客户端代码：

import socket
import threading

class Client:
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    def __init__(self, address):
       self.address = address

    def receive(self):
        while True:
            data = self.sock.recv(1024)
            if not data:
                break
            print(data)

    def start(self):
        self.sock.connect((self.address, 5000))
        i_thread = threading.Thread(target=self.receive)
        i_thread.daemon = True
        i_thread.start()

        while True:
            self.sock.send(bytes(input('> '), 'utf-8'))