No sticking problem packet protocol udp
no connection
datagram: each data a header carrying
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import socket client=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) while True: msg=input('>>: ').strip() client.sendto(msg.encode('utf-8'),('127.0.0.1',8082)) data,server_addr=client.recvfrom(1024) print(data)
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import socket server=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) server.bind(('127.0.0.1',8082)) while True: data,client_addr=server.recvfrom(1024) print(data) server.sendto(data.upper(),client_addr) server.close()