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服务端

import socket

sever=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

sever.bind(('127.0.0.1',8083))

sever.listen(5)

conn,client_addr=sever.accept()
data=conn.recv(1024)
if data == 'q':
    conn.close()
res=bytes((eval(data)))


conn.send(res)

客户端

import socket

client=socket.socket(socket.AF_INET,socket.SOCK_STREAM)

client.connect(('127.0.0.1',8083))

cmd='2+3'

client.send(cmd.encode('utf8'))

res=client.recv(1024)
print('=====',res.decode('utf8'))
client.close()