question about the mainloop

[globalrev]

On 21 Apr, 07:31, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Mon, 21 Apr 2008 00:57:38 -0300, globalrev <skanem... at yahoo.se> escribió:
>
>
>
> > On 21 Apr, 04:26, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> >> En Sun, 20 Apr 2008 20:24:04 -0300, globalrev <skanem... at yahoo.se> escribió:
>
> >> > i dont get the mainloop() in python. i mean i have written some
> >> > programs, for example a calculator using tkinterGUI.
>
> >> What you call the "mainloop" is the event loop (or message loop) used by event-driven applications as a way to dispatch all events as they happen in the system. The concept is independent of Python/C++/whatever language you choose. The key phrase is "event-driven programming":http://en.wikipedia.org/wiki/Event_driven_programming
> >> Tkinter provides an event-driven GUI framework. Simple CLI programs are not event-driven, as your pseudo example above.
>
> >> > if i have some functions i wanna call to run the program and i wanna
> >> > call them ina specific order and be able to call
> >> > them from each other should this just be called in the mainloop and
> >> > the mianloop then runs the "mainscript" top
> >> > to bottom over and over?
>
> >> If you don't want or don't require a graphical user interface, just write the functions you need and call them from the outermost section in your script.
> >> If you do require a GUI, you'll have to write the code in response to user actions: when the user clicks here, do this; when the user chooses that menu option, do that.
>
> > but what i mean i dont understand is sure i can bind a function to a
> > buttonpress but if i have a def dox(): dododo
> >  and i call it with dox() in the mainscript it will be executed once,
> > but not again.
> > so what does the mainloop do, 1srt time it is executed it runs the
> > mainscript then it it sits and wait s for commands?
>
> What's the "mainscript"?
> The "mainloop" just waits for system events like: mouse movement, mouse click, key pressed, key released, time elapsed, window is uncovered, etc. And when any event arrives, it's dispatched to its registered handler.
> Python executes whatever you wrote at the top level of the script you are running, up to the root.mainloop() line. That function doesn't return until the main window is closed; all the user interaction occurs inside that call. Finally, execution resumes on the next line, if any.
> I hope this answers your question; if not, try to be more specific. Maybe an example of what you want to do.
>
> --
> Gabriel Genellina


ty everyone i get it now.