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'')
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