non-blocking sockets

[Michael Gilfix]

  You need to use the select module to poll the socket. The select
module allows you to specify how long you want your timeout (in this
case, you probably want a timeout of 0, which is simply a poll) and
the module tells you which sockets are waiting for reading/writing.

  import select
  read_sock = <my readable socket>
  w_ready, r_ready, e_ready = select.select ([ ], [ read_sock ], [ ], 0)

  if read_sock in r_ready:
    # Process socket

  ... will probably do what you want.

  Check out the library ref docs for select at:
http://www.python.org/doc/current/lib/module-select.html

                 -- Mike

On Tue, Apr 23 @ 15:00, so very tired wrote:
> When trying to read from a socket, I don't want it hanging, so I set it to
> non-blocking by calling
> 
> setblocking(0)
> 
> but then when I try to read from it and there is no data in the socket, I
> get an error. I tried this in both windows and linux and in both I get an
> error and the program stops. It says there's an exception but it doesn't
> say the name of the exception so I can't even try to catch.
> Does anyone know how I can check if there's data coming from a socket
> connection without hanging or having the program barf on me?
> Thanks.
> mRiaz
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
`-> (g0riaman)

-- 
Michael Gilfix
mgilfix at eecs.tufts.edu

For my gpg public key:
http://www.eecs.tufts.edu/~mgilfix/contact.html