Python socket如何实现服务端和客户端数据传输(TCP)

import socket
#创建一个socket对象
socket_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = "127.0.0.1"
port = 9999
#绑定地址
socket_server.bind((host, port))
#设置监听
socket_server.listen(5)
# socket_server.accept()返回一个元组, 元素1为客户端的socket对象, 元素2为客户端的地址(ip地址，端口号)
client_socket, address = socket_server.accept()
#while循环是为了让对话持续
while True:
	#接收客户端的请求
    recvmsg = client_socket.recv(1024)
    #把接收到的数据进行解码
    strData = recvmsg.decode("utf-8")
    #设置退出条件
    if strData == 'q':
        break
    print("接收: %s" % strData)
    #输入
    msg = input("发送: ")
    #发送数据，需要进行编码
    client_socket.send(msg.encode("utf-8"))
#关闭服务器端
socket_server.close()

import socket
#创建一个socket对象
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
host = "127.0.0.1"
port = 9999
#连接服务端
client.connect((host, port))
while True:
    send_msg = input("发送: ")
    #设置退出条件
    if send_msg == "q":
        break
    send_msg = send_msg
    #发送数据，编码
    client.send(send_msg.encode("utf-8"))
    #接收服务端返回的数据
    msg = client.recv(1024)
    #解码
    print("接收：%s", % msg.decode("utf-8"))
#关闭客户端
client.close()

import socket
import time
print("服务端开启")
#创建套接字
mySocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#设置IP和端口
#host = socket.gethostname()
host = '127.0.1.1'
port = 3333
#bind绑定该端口
mySocket.bind((host, port))
#监听
mySocket.listen(10)
while True:
    #接收客户端连接
    print("等待连接....")
    client, address = mySocket.accept()
    print("新连接")
    print("IP is %s" % address[0])
    print("port is %d\n" % address[1]) 
    while True:
        #发送消息
        msg = input("服务端发送:")
        client.send(msg.encode(encoding='utf-8'))
        print("发送完成")
        print (time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))#格式化时间戳为标准格式
        if msg == "EOF":
            break
        if msg == "quit":
            client.close()
            mySocket.close()
            print("程序结束\n")
            exit()
        
        #读取消息
        msg = client.recv(1024)
        print("服务端接收:",msg.decode("utf-8"))#把接收到的数据进行解码
        print("读取完成")
        if msg == b"EOF":
            break
        if msg == b"quit":
            client.close()
            mySocket.close()
            print("程序结束\n")
            exit()

import socket
print("客户端开启")
#创建套接字
mySocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#设置ip和端口
#host = socket.gethostname()
host = '127.0.1.1'
port = 3333
 
try:
    mySocket.connect((host, port)) ##连接到服务器
    print("连接到服务器")
except :                           ##连接不成功，运行最初的ip
    print ('连接不成功')
 
while 1:
    #接收消息
    msg = mySocket.recv(1024)  
    print("客户端接收：%s" % msg.decode("utf-8"))#把接收到的数据进行解码
    print("读取完成")	
    if msg == b"EOF":
        break
    if msg == b"quit":
        mySocket.close()
        print("程序结束\n")
        exit()
    
    #发送消息
    msg = input("客户端发送:")
    mySocket.send(msg.encode(encoding='utf-8'))
    print("发送完成")
    if msg == "EOF":
        break
    if msg == "quit":
        mySocket.close()
        print("程序结束\n")
        exit()       
print("程序结束\n")