Tkinter listener thread?

Grant Edwards grante at
Thu Jan 26 12:46:21 EST 2006

On 2006-01-26, Steve Holden <steve at> wrote:
> gregarican wrote:
>> I have a Python UDP listener socket that waits for incoming data. The
>> socket runs as an endless loop. I would like to pop the incoming data
>> into an existing Tkinter app that I have created. What's the
>> easiest/most efficient way of handling this? Would I create a separate
>> thread that has the listener set a certain Tkinter variable if there is
>> incoming data? Any suggestions would be tremendously appreciated :-)

That seems a bit complex.  Why not just register the file
descriptor and read-handler with Tk?

That way the read-handler gets called by Tk's event loop
anytime there's receive data waiting.  No extra thread, no
synchronization worries.

If the read-handler takes a _long_ time to complete, it does
make your GUI pause, so that may be a concern.

Unless tk.createfilehandler isn't supported no Wni32

Grant Edwards                   grante             Yow!  Gee, I feel kind of
                                  at               LIGHT in the head now,
                                 knowing I can't make my
                                                   satellite dish PAYMENTS!

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