多线程socket UDP收发数据

from threading import Thread
from socket import *

def sendData():
while True:
sendInfo = input('<<')
udpSocket.sendto(sendInfo.encode('gb2312'),(destIp,destPort))

def recevData():
while True:
recvInfo = udpSocket.recvfrom(1024)
print('>>%s : %s'%(str(recvInfo[1]),recvInfo[0].decode('gb2312')))

udpSocket = None
destIp = ''
destPort = 0
def main():
global udpSocket
global destIp
global destPort
destIp = input('请输入对方IP：')
destPort = int(input('请输入对方Port：'))
udpSocket = socket(AF_INET,SOCK_DGRAM)
udpSocket.bind(('',6677))

ts = Thread(target=sendData)
tr = Thread(target=recevData)

ts.start()
tr.start()

ts.join()
tr.join()

if __name__ == '__main__':
main()