最简单的tcp客户端和服务端 还有udp

tcp服务器：

# -*- coding: utf-8 -*-
"""
Created on Tue May 26 21:39:55 2020

@author: Administrator
"""
import socket
#创建套接字
tcp_server_socket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#绑定IP和port
address=('',8080)
#listen使套接字变为可被动连接
tcp_server_socket.bind(address)
tcp_server_socket.listen(128)

#accept等待客户端链接
while True:
    
    client_addr,a=tcp_server_socket.accept()
    print(client_addr)
    
    #recv/send接收或发送数据
    while True:
        
        recv_data=client_addr.recv(1024)
        print(recv_data)
#        发过来数据会解堵塞
#        客户端关闭链接也会解堵塞此时为空
        if recv_data:
            
            client_addr.send("服务器已收到".encode("utf-8"))
        else:
            
            client_addr.close()
            break
tcp_server_socket.close()

tcp客户端：

# -*- coding: utf-8 -*-
"""
Created on Tue May 26 21:13:26 2020

@author: Administrator
"""
import socket
#创建链接字
tcp_client_socket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#目的信息
server_ip="192.168.236.129"
server_port=8080
#链接服务器
tcp_client_socket.connect((server_ip,server_port))
#提示用户输入数据
send_data="hello"
#发送
tcp_client_socket.send(send_data.encode("utf-8"))
#接受对方发过来的数据，最大1024
recvdata=tcp_client_socket.recv(1024)
print(recvdata)
#关闭连接
tcp_client_socket.close()

udp

## -*- coding: utf-8 -*-
#"""
#Created on Tue May 26 10:53:22 2020
#
#@author: Administrator
#"""
#
##导入模块
#import socket
##创建socket
#skt  = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#skt.bind(('',8080))
#while True:
#    
#    #创建发送消息和发送目标
#    msg = input()
#    addr = ('192.168.236.128',8080)
#    k=bytes(msg, encoding="utf8")
#    skt.sendto(k,addr)
#    
##    接收数据：
#    data = skt.recvfrom(1024)
##    print(data)
#    s2 = str(data[0], encoding="UTF-8")
#    print("             "+s2)
#   
#skt.close()

#!/usr/bin/python3

import threading
import time
import socket


class Server_Thread(threading.Thread):
    def __init__(self,threadID,name,skt):
        threading.Thread.__init__(self)
        self.threadID=threadID
        self.name=name
        self.skt=skt
    def run(self):
        while True:
            
            data = self.skt.recvfrom(1024)
        #    print(data)
            s2 = str(data[0], encoding="UTF-8")
            print("             "+self.name+":"+s2)
class Client_Thread(threading.Thread):
    def __init__(self,threadID,name,skt):
        threading.Thread.__init__(self)
        self.threadID=threadID
        self.name=name
        self.skt=skt
    def run(self):
        while True:
            
         #创建发送消息和发送目标
            msg = input()
            addr = ('192.168.236.128',8080)
            k=bytes(msg, encoding="utf8")
            self.skt.sendto(k,addr)
def main():
    
    skt  = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    skt.bind(('',8081))
    # 创建新线程
    thread1 = Client_Thread(1, "windows",skt)
    thread2 = Server_Thread(2, "linux",skt)
    
    # 开启新线程
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    skt.close()

if __name__=="__main__":
    main()