在看视频自学 python 时，学习到 socket 模块，简单的服务端与客户端之间的通讯。代码很简单，但是这是刚刚开始。
#Server
import socket
host = '127.0.0.1'
port = 8989
server = socket.socket()
server.bind((host,port))
server.listen(5)
while True:
conn,addr = server.accept()
print(conn,addr)
while True:
data = conn.recv(1024)
if not data:break
conn.sendall(b'%s recv ok !'%data)
print(data.decode('utf-8'))
conn.close()
server.close()
#Client
import socket
host = '127.0.0.1'
port = 8989
client = socket.socket()
client.connect((host,port))
while True:
send_data = input('>>:')
if len(send_data) == 0:continue
client.sendall(send_data.encode('utf-8'))
data = client.recv(1024).decode('utf-8')
print(data)
client.close()
