python socket编程腾讯云下报错[Errno 99] Cannot assign requested address的解决方式

先写服务端server.py：

import socket
import time

HOST = '172.17.xx.xx'  #服务器的私网IP
#HOST = 'localhost'
PORT = 8001
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind((HOST, PORT))
sock.listen(5)
while True:
    connection,address = sock.accept()
    try:
        connection.settimeout(10)
        buf = connection.recv(1024)
        if buf:
            connection.send(b'welcome to server!')
            print('Connection success!')
        else:
            connection.send(b'please go out!')
    except socket.timeout:
        print ('time out')
    connection.close()
 

客户端client.py:

import socket
import time

#HOST = 'localhost' 
HOST = '212.64.xx.xx'  #服务器的公网IP
PORT = 8001
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((HOST, PORT))
time.sleep(2)
sock.send(b'1')
print (sock.recv(1024).decode())
sock.close()  

使用本地测试（即HOST='localhost'）是可以的，但是在腾讯云/阿里云上报错“[Errno 99] Cannot assign requested address”，解决方法：服务端的ip填私网ip，客户端填公网ip。

参考链接：

1. https://blog.csdn.net/weixin_41656968/article/details/80042554

2. https://blog.csdn.net/weixin_43146445/article/details/93506761