Application Timers (bpy.app.timers)

Run a Function in x Seconds

import bpy

def in_5_seconds():
    print("Hello World")

bpy.app.timers.register(in_5_seconds, first_interval=5)

Run a Function every x Seconds

import bpy

def every_2_seconds():
    print("Hello World")
    return 2.0

bpy.app.timers.register(every_2_seconds)

Run a Function n times every x seconds

import bpy

counter = 0


def run_10_times():
    global counter
    counter += 1
    print(counter)
    if counter == 10:
        return None
    return 0.1


bpy.app.timers.register(run_10_times)

Assign parameters to functions

import bpy
import functools


def print_message(message):
    print("Message:", message)


bpy.app.timers.register(functools.partial(print_message, "Hello"), first_interval=2.0)
bpy.app.timers.register(functools.partial(print_message, "World"), first_interval=3.0)

bpy.app.timers.is_registered(function)

Check if this function is registered as a timer.

Parameters: function (Callable[[], float | None]) – Function to check.
Returns: True when this function is registered, otherwise False.
Return type: bool

bpy.app.timers.register(function, first_interval=0, persistent=False)

Add a new function that will be called after the specified amount of seconds. The function gets no arguments and is expected to return either None or a float. If None is returned, the timer will be unregistered. A returned number specifies the delay until the function is called again. functools.partial can be used to assign some parameters.

Parameters

function (Callable[[], float | None]) – The function that should called.
first_interval (float) – Seconds until the callback should be called the first time.
persistent (bool) – Don’t remove timer when a new file is loaded.

bpy.app.timers.unregister(function)

Unregister timer.

Parameters: function (Callable[[], float | None]) – Function to unregister.