How to create multi-server sockets on one client in Python?

Question

How to create multi-server sockets on one client in Python ? I am thinking about create a List of server socket and make the connection with non-blocking socket, but i don't find a good tutorial for that, thats why i came here, to ask for better solution or a guide for non-blocking socket.

Thank you !

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Thank for the help, but i mean to something different, i have list of Servers Ip like that:

SERVER_IP = ['127.0.0.1', '127.0.0.2', '127.0.0.3', '127.0.0.4', '127.0.0.5', '127.0.0.6, '127.0.0.7']

I have one option to create a list of sockets by ip, and try to connect to every Ip Server, but i ask here if i have a different way to connect to all this Servers Ip without a list of sockets, something more convenient.

Thank you.

Answer 1

If you want to have multiple sockets connected to multiple servers, you should check out the select module (http://docs.python.org/2/library/select.html).

Basically, it works like this:

import socket, select
socks = {}
# Connect to different servers here #
sock1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socks[sock1.fileno()] = sock1
poll = select.poll()
for sock in socks:
    poll.register(sock)
while 1:
    fd, event = poll.poll() # Optional timeout parameter in seconds
    sock = socks[fd]
    sock.recv(1024) # Do stuff

A note, the poll.poll() method returns the underlying file number (what your operating system uses to represent files) which is useless to you. I just stores the sockets in a dictionary by that number so you could get the actual socket object from the filenumber that is given by poll. I recommend reading the documentation for select.poll, the link above.

Answer 2

You can use select.
http://pymotw.com/2/select/ plus the select documentation.
Or some third party module such as twisted.