For this you should probably use an integration of asyncio (which can do async subprocess output nicely) with Tkinter. Over in tulip-land there is an demo of such an integration.
On Tue, May 5, 2015 at 6:03 PM, Terry Reedy <tjre...@udel.edu> wrote: > On 5/5/2015 6:25 PM, Yury Selivanov wrote: > > Yes, there is no other popular event loop for 3.4 other >> than asyncio, >> > > There is the tk(inter) event loop which also ships with CPython, and which > is commonly used. > > that uses coroutines based on generators >> > > Oh ;-) Tkinter event loop is callback based. AFAIK, so is the asyncio > event loop, but that is somehow masked by tasks that interface to > coroutines. Do you think the 'somehow' could be adapted to work with the > tkinter loop? > > What I do not understand is how io events become event loop Event > instances. For tk, keyboard and mouse actions seen by the OS become tk > Events associated with a widget. Some widgets generate events. User code > can also generate (pseudo)events. > > My specific use case is to be able to run a program in a separate process, > but display the output in the gui process -- something like this (in Idle, > for instance). (Apologies if this misuses the new keywords.) > > async def menu_handler() > ow = OutputWindow(args) # tk Widget > proc = subprocess.Popen (or multiprocessing equivalent) > out = (stdout from process) > await for line in out: > ow.write(line) > finish() > > I want the handler to not block event processing, and disappear after > finishing. Might 492 make this possible someday? Or would having 'line in > pipe' or just 'data in pipe' translated to a tk event likely require a > patch to tk? > > -- > Terry Jan Reedy > > > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/guido%40python.org > -- --Guido van Rossum (python.org/~guido)
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