Ren'Py Having trouble running a function in the background using Python

[Dogrin]

Hello!
I'm facing an issue with running a function in the background. Basically, I want a Python idle function to perform calculations and update a progress bar in the background.
I utilized the "renpy.restart_interaction()" command to update the progress bar. Without it, I wouldn't get a visual update for the progress bar. Everything seems to be going well, but after some time, I encounter this error:

While running game code:
  File "game/scripts/test.rpy", line 24, in script
    call screen progress_bar
  File "renpy/common/000statements.rpy", line 670, in execute_call_screen
    store._return = renpy.call_screen(name, *args, **kwargs)
Exception: renpy.restart_interaction() was called 100 times without processing any input.

Here is a code which I use:

init python:
    from time import time
    class IdleRun:
        def __init__(self):
            self.start = time()
            self.progress_bar_value = 0

        def update_progress_bar(self):
            if time() - self.start >= 0.1:
                self.progress_bar_value += 1
                renpy.restart_interaction()
                # self.start = time()

    
    # a method to run some calculations in the background
    def background_update(t, st, at):
        idlerun.update_progress_bar()
        return 0

label progress_bar_test:
    $ idlerun = IdleRun()
    $ update_placeholder = Transform(function = background_update)

    call screen progress_bar
    return

screen progress_bar:
    add update_placeholder
    bar:
        value idlerun.progress_bar_value
        range 100
        xysize(200,25)
        xalign 1.0
        yalign 0.5

 

[anne O'nymous]

I'm facing an issue with running a function in the background.

Then this how to is made for you, more precisely its part regarding the timer screen statement.
Alternatively it would also works with a

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, but there's no real need to go this far.

 

[Dogrin]

Thank you very much!
"config.periodic_callbacks" is definitely what I need.
Now I know how to make it the most efficient way, thanks to you!

 

[anne O'nymous]

Thank you very much!
"config.periodic_callbacks" is definitely what I need.
Now I know how to make it the most efficient way, thanks to you!

While, as I said, the timer screen statement is how you should do it, since it would take care of the screen update for you...