Solved

[python][network]   simplest networking

Posted on 2007-11-23
2
327 Views
Last Modified: 2010-04-16
I just want python to send a line of text to the other script on the other computer


they are on the same network,

so,

just a server script listening for

a client script sending one line of text,


is it possible?
0
Comment
Question by:Troudeloup
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 17

Expert Comment

by:ramrom
ID: 20341256
Yes - see the socket module
0
 
LVL 29

Accepted Solution

by:
pepr earned 500 total points
ID: 20344140
If you are allowed, see the question http:#21995292 and the answers. If you cannot search for the answers, here are copies of my answers...

1) Focus on the built-in module socket (Python doc "7.2 socket -- Low-level networking interface"). See the examples:

http://www.qiksearch.com/python/sockets/server.py
http://www.qiksearch.com/python/sockets/client.py

They are a bit old and could be written aestetically better, but they show the principle. (Add the line UDPSock.sendto('', addr) before the break to finish the server when sending empty line.)

Later, you may get info and inspiration in the standard module SocketServer Python doc ("11.16 SocketServer -- A framework for network servers")

Use the snippets below, store them in separate files -- one for the server, one for the client. The UDP is the simplest form of usage of the IP protocol. See http://en.wikipedia.org/wiki/User_Datagram_Protocol. More reliable transfer can be done via TCP (see http://en.wikipedia.org/wiki/Transmission_Control_Protocol).
# Server program
 
import socket
 
# Set the socket parameters
addr = ('', 33333)  # host, port
 
# Create socket and bind to address
UDPSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
UDPSock.bind(addr)
 
# Receive messages
while True:
    data, addr = UDPSock.recvfrom(1024)
    if data == 'stop':
        print 'Client wants me to stop.'
        break
    else:
        print "From addr: '%s', msg: '%s'" % (addr[0], data)
 
# Close socket
UDPSock.close()
print 'Server stopped.'
 
---------------------------------------------------------------
 
# Client program
 
import socket
 
 
#addr = ('localhost', 33333)                                # localhost, port
#addr = ('127.0.0.1', 33333)                                # localhost explicitly
#addr = ('xyz', 33333)                                      # explicit computer
#addr = ('<broadcast>', 33333)                              # broadcast address
addr = ('255.255.255.255', 33333)                          # broadcast address explicitly
 
UDPSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # Create socket
 
print 'Enter your message:'
print '- Empty message to stop this client.'
print '- "stop" to stop all servers.'
 
# Almost infinite loop... ;)
while True:
    data = raw_input('>> ')
    if len(data) == 0:
        break
    else:
        if UDPSock.sendto(data, addr):
            print "Sending message '%s'..." % data
 
UDPSock.close()             # Close socket
print 'Client stopped.'

Open in new window

0

Featured Post

Get HTML5 Certified

Want to be a web developer? You'll need to know HTML. Prepare for HTML5 certification by enrolling in July's Course of the Month! It's free for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Less strange, but still introduction This introduction was added (1st August, 2011) to reflect some reactions.  Firstly, the term basics in the title of the article...  As any other word, it is a symbol with meaning attached to the word by some a…
Here I am using Python IDLE(GUI) to write a simple program and save it, so that we can just execute it in future. Because when we write any program and exit from Python then program that we have written will be lost. So for not losing our program we…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
Learn the basics of lists in Python. Lists, as their name suggests, are a means for ordering and storing values. : Lists are declared using brackets; for example: t = [1, 2, 3]: Lists may contain a mix of data types; for example: t = ['string', 1, T…
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question