###########################
server端：
import socket
server= socket.socket()

server.bind(('localhost',6969))
server.listen()

print("等电话")
conn,addr=server.accept()
print(conn,addr)
print("来了")
data = conn.recv(1024)
print("recv:",data)
conn.send(data.upper())
server.close()

###########################
client端：

import socket
client = socket.socket()
client.connect(('localhost',6969))

client.send(b"hello world")
data = client.recv(1024)
print("recv:",data)
client.close()

#########################
#########################
client端：
####
import socket
client = socket.socket()
client.connect(('10.0.0.11',6969))
while True:
    msg=input(">>:").strip()
    client.send(msg.encode('utf8'))
    data = client.recv(1024)
    print("recv:", data)

client.close()

####
server端：
####
import socket
server= socket.socket()

server.bind(('10.0.0.11',6969))
server.listen()

print("等电话")
conn,addr=server.accept()
print(conn,addr)
print("来了")
while True:
    data = conn.recv(1024)
    print("recv:", data.decode())
    conn.send(data.upper())
server.close()

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