server:

# -*- coding:gb2312 -*-import socketimport timeimport structif __name__ == "__main__":    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)    host=''    port=12345    s.bind((host,port))       while 1:        print("wait***")        message,address=s.recvfrom(1024)        message=bytes.decode(message)        if message != 'time':            print("message error")            continue        secs=time.ctime()        reply=str.encode(secs)        s.sendto(reply,address)        print("succeed")

client:

# -*- coding=gb2312 -*-import socketif __name__ == "__main__":    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)    address=('127.0.0.1',12345)    s.connect(address)    data=b'time'    s.sendall(data)    buf,address=s.recvfrom(1024)    buf=bytes.decode(buf)    print(buf)    print(address)