QUdpSocket在PyQt5中没有writeDatagram()函数吗？

import sys
from PyQt5.QtCore import QCoreApplication, QUdpSocket

def send_udp_message():
    udp_socket = QUdpSocket()
    message = b"Hello, UDP!"
    udp_socket.writeDatagram(message, QHostAddress("127.0.0.1"), 12345)

def receive_udp_message():
    udp_socket = QUdpSocket()
    udp_socket.bind(QHostAddress("127.0.0.1"), 12345)
    while True:
        datagram, host, port = udp_socket.readDatagram(1024)
        print(f"Received message: {datagram.data().decode()} from {host}:{port}")

if __name__ == "__main__":
    app = QCoreApplication(sys.argv)
    
    # 启动发送和接收线程
    send_thread = threading.Thread(target=send_udp_message)
    receive_thread = threading.Thread(target=receive_udp_message)
    
    send_thread.start()
    receive_thread.start()
    
    sys.exit(app.exec_())