socket communication process and a simple network communication program

"" " 
　　Server.py    
　　simulated network communications server-side code 
" "" 
Import socket socket packet # Import 
SK = socket.socket () # establish socket object
 Print (SK) 
address = ( ' 127.0.0.1 ' , 8888 ) to generate an address # tuples of information 
sk.bind (address) # binding address information 
sk.listen ( . 3 ) set the maximum number of connections #
 '' ' 
the server does not shut down, the client closes the input exit, receives a contents server connected to, for dialogue 
'' ' 
# method 
# Conn, addr = sk.accept () 
# Print (Conn) 
# the while True: 
#      Data = conn.recv (1024) 
#      IF STR (Data,' UTF8 ') =='':
#         conn,addr=sk.accept()
#         print(addr)
#         continue
#     print(str(data,'utf8'))
#     ssData=input('>>>')
#     conn.send(bytes(ssData,'utf8'))


#方法二
while True:
   conn, addr = sk.accept()
   while True:
       try:
           data = conn.recv(1024)
       except Exception:
           break
       if str(data, 'utf8') == '':
           break
       print(str(data, 'utf8'))
       ssData = input('>>>')
       conn.send(bytes(ssData, 'utf8'))

Client code as follows: client.py

Import Socket 
SK2 = socket.socket () 
address = ( ' 127.0.0.1 ' , 8888 ) 
sk2.connect (address) 
Print (SK2)
 the while True: 
    CDATA = INPUT ( ' >>> ' )
     IF CDATA == ' Exit ' : when a client inputs # exit, the client terminates the current connection
         BREAK 
    sk2.send (bytes (CDATA, ' UTF8 ' )) 
    crdata = sk2.recv (1024 )
     Print (STR (crdata, ' UTF8 ' ))
sk2.close()

Need to turn on Allow parallet run option when debugging ,, in pycharm the Run -> Edit Configurations -> Allow parallel run (upper right corner)