How to set PyQt5 Qtimer to update in specified interval?

Question

I would like to update the Qtimer according to a framerate of 15 FPS - so my def update(): recieves a signal every 0,06 s. Can you help me? I have attached a code example below where my setInterval input is 1/15, but I dont know if that is the way to go. Thanks.

from PyQt5 import QtCore

def update():
    print('hey')

fps = 15
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.setInterval(1/fps)
timer.start()

Answer 1

You have the following errors:

• setInterval() receives the time in milliseconds, so you must change it to timer.setInterval(1000/fps).

• Like many Qt components, the QTimer needs you to create QXApplication and start the event loop, in this case a QCoreApplication is enough.

import sys

from PyQt5 import QtCore


def update():
    print("hey")


if __name__ == "__main__":

    app = QtCore.QCoreApplication(sys.argv)

    fps = 15
    timer = QtCore.QTimer()
    timer.timeout.connect(update)
    timer.setInterval(1000 / fps)
    timer.start()

    app.exec_()