Python Network programming Start (socket send message) _python

One, service side (server.py)
The thing to do for the service side is:
1. Create a Socket object

Import Socket
s = socket.socket (socket.af_inet, socket. SOCK_DGRAM)

2. Bind a Port

S.bind (("", 8081))

3. Accept messages from the client

While True:
# Receive up to 1,024 bytes in a datagram
data, addr = S.recvfrom (1024)
print "Received:", data, "from",addr

Second, the client (client.py)
What the client is going to do is:
1. Create a Socket object.

Import Socket
s = socket.socket (socket.af_inet, socket. SOCK_DGRAM)

2. Send a message to a specified port on a server. Because UDP is used, packets will be discarded if the server side is not received.

Port = 8081
Host = "localhost"
While True:
msg = raw_input ()
S.sendto (MSG, (host, Port))

Third, the operation tries