网络编程 Socket（TCP协议）

import socket
sk = socket.socket()                 #买手机
# sk.bind(('ip','prot'))             #绑定手机
sk.bind(('127.0.0.1',8080))         #绑定手机卡
sk.listen()                          #监听
conn , addr = sk.accept()            #接收到别人的电话

ret = conn.recv(1024)                      #听别人说话
print(ret)
conn.send(b'hi')                          #和别人说话，必须传一个bytes类型
conn.close()
sk.close()

import socket
sk = socket.socket()
sk.connect(('127.0.0.1',8080))
sk.send(b'hello')
ret = sk.recv(1024)
print(ret)
sk.close()

聊天例子：

import socket
sk = socket.socket()
sk.bind(('127.0.0.1',8070))
sk.listen()
conn,addr = sk.accept()
while True:
    ret = conn.recv(1024).decode('utf-8')
    if  ret == 'bye':
        break
    print(ret)
    info = input('>>>')
    conn.send(bytes(info,encoding='utf-8'))
conn.close()
sk.close()

# import socket
# sk = socket.socket()
# sk.connect(('127.0.0.1',8070))
# while True:
#     info = input('>>>')
#     sk.send(bytes(info,encoding='utf-8'))
#     ret = sk.recv(1024).decode('utf-8')
#     print(ret)
#     if ret == 'bye':
#         break
# sk.close()