网络编程IO

客户端流程 代码实现：day4/tcp_client.py![ ](https://img-blog.csdnimg.cn/20191129212407203.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTgxOT

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