[Tutor] Socket Programming

[Alan Gauld]

On 08/04/13 08:06, Mousumi Basu wrote:

> import socket
> import sys
> s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
> try:
>      s=s.bind(('172.18.2.11',2213))
>      print 'socket bind is complete'
> except socket.error,msg:
>      print 'bind failed'
>      sys.exit()

Your first error is that when developing you don't want to hide the 
error messages so add a raise statement to the except block so you get 
the full traceback with all of its helpful details.


> but when i am writting;-
>
> s=s.bind(('localhost',2213))
>
> the output is;-
> socket bind is complete

Which suggests that the 172... IP address you are using above is not 
recognised... or maybe has a firewall around it, or some other 
restrictions on access.

> Can you please tell me where i am making the error?
> (The computers are connected as the ping operation is executing properly
> in command prompt)

It is most likely a network configuration issue but only you can fix 
that since we can't see how the network is set up. Rather than using 
ping try using telnet to reach the IP address and port and see what 
response you get.

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/