Tkinter and asyncronous socket

Hendrik van Rooyen mail at microcorp.co.za
Fri Nov 28 04:20:22 CET 2008


 <maxlosblob at gmail.com> wrote:

On 26 Nov, 13:42, Steve Holden <st... at holdenweb.com> wrote:

>> One approach would be to run the socket code in blocking mode in a
>> separate thread started by the (main program) GUI thread at program
>> startup, and communicating results back via a Queue.Queue or similar to
>> the GUI thread. That thread wakes itself up once every (say) 500 mS to
>> check for updates from the socket side.
>>
>> You should see your CPU utilization go down then. The threading.thread
>> library is actually much easier to use than you would think, though it's
>> possible to get things wrong by assuming data sharing will work in ways
>> it actually doesn't. But if you have the main thread pass a Queue to the
>> networking thread, that should be a reliable means of communication.
>>
>
>Thankk you Steve, I have now a GUI and a threaded socket client
>receiving data on its socket. I pass to it a queue object from the
>GUI, but when it tries to push a value on the queue, the GUI does not
>see any value. My last work with OOP is as far in time as the
>beginning of Java, I'm surely missing something simple but very
>important.
>Anyway, the goal to have a responsive GUI and a functional socket has
>been achieved, thanks again. If you have hints on the queue problem,
>your help is welcome.

If you are not already doing it, you need to make a "stutter thread"
by using the after() call on some gui object to periodically check for
input on the queue.

There is a recipe for this but I have yet again lost the link.

- Hendrik




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