[Python3] simple socket programming demo

Divided into client and server

# Server program 
Import socket 

IF  __name__ == ' __main__ ' :
     # 1. Create a socket (socket) objects 
    Serv = socket.socket ()
     # 2. Bind address information 
    Host = socket.gethostname () 
    Port = 12345 
    Serv .bind ((Host, Port)) 
    # 3. open listening 
    serv.listen (5)   # maximum number sequences to wait, you can wait five, the sixth was rejected, usually the default is 5 
    Print ( " monitor is turned on , .... waiting for connection " )
     # 4. wait for connection from the client 
    the while . 1 : 
        Conn, address = serv.accept ()  # Returns the socket connection object and the client address address, a tuple structure 
        Print ( " connection address:% S " % (str (address [0]))) 
        msg = " I am a service, please visit " 
        conn.send (msg .encode ( ' UTF-. 8 ' )) 
    serv.close ()

Which we encountered a error: a bytes-like object is required

The solution:
the solution is very simple, you only need to spend a function of bytes and encode python str two types of conversion (), decode () can be!

str by encode () method may be coded as specified in bytes;
conversely, if we read the byte stream from the network or disk, the data is read bytes. Bytes should become str, you require a decode () method;

# Client program

Import Socket
 
IF  the __name__ == ' __main__ ' : 
    Client = socket.socket ()
     # 1. Create a connection to the server and the 
    Host = socket.gethostname () 
    Port = 12345 
    the client.connect ((Host, Port)) 
    # receiving less than 1024 words section data 
    MSG = client.recv (1024 ) 
    client.close () 
    Print (msg.decode ( ' UTF-. 8 ' ))

 

Then open the two terminals can be tested