import socket
HostPort = ('127.0.0.1',9999)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind(HostPort)
s.listen(1)
conn,addr = s.accept()
#print('Connecting by : %s ' % addr)
while 1:
 data = conn.recv(1024).decode()
 print (data)
 user_input = input('>')
 conn.send(user_input.encode('utf8'))
 #conn.close()
s.close()

import socket
hostport = ('127.0.0.1',9999)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(hostport)
 
while 1:
 user_input = input('> ').strip()
 s.send(user_input.encode('utf-8'))
 if len(user_input) == 0:
 continue
 if user_input == 'quit':
 s.close()
 break
 server_reply = s.recv(1024).decode()
 print (server_reply)

import socket
import threading # 导入多线程模块
print("Waitting to be connected......")
HostPort = ('127.0.0.1',9999)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) # 创建socket实例
s.bind(HostPort)
s.listen(1)
conn,addr = s.accept()
true=True
addr = str(addr)
print('Connecting by : %s ' %addr )
def Receve(conn):   # 将接收定义成一个函数
 global true # 声明全局变量，当接收到的消息为quit时，则触发全局变量 true = False，则会将socket关闭
 while true:
 data = conn.recv(1024).decode('utf8') 
 if data == 'quit':
 true=False
 print("you have receve: "+data+" from"+addr) # 当接收的值为'quit'时，退出接收线程，否则，循环接收并打印
thrd=threading.Thread(target=Receve,args=(conn,)) # 线程实例化，target为方法，args为方法的参数 
thrd.start()    # 启动线程
while true:
 user_input = input('>')
 conn.send(user_input.encode('utf8'))  # 循环发送消息
 if user_input == 'quit':   # 当发送为‘quit'时，关闭socket
 true = False
 #conn.close()
s.close()

import socket
import threading
hostport = ('127.0.0.1',9999)
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(hostport)
true = True
def Receve(s):
 global true
 while true:
 data = s.recv(1024).decode('utf8')
 if data == 'quit':
 true = False
 print('recevie news:\033[5;37;46m%s\033[0m' % data )
thrd=threading.Thread(target=Receve,args=(s,))
thrd.start()
while true:
 user_input = input('>')
 s.send(user_input.encode('utf8'))
 if user_input == 'quit':
 true = False
s.close()