Learn how to use tkinter to set up a weekly task schedule starting from a user-selected date

Question

Learn how to use tkinter to set up a weekly task schedule starting from a user-selected date

Weekly, I am trying to automate downloading files at a specific time and day chosen by the user, similar to what is displayed in this image. My current challenge involves integrating an inner loop concerning root.mainloop(). I have experimented with both .after and a while loop structured like this:

def autoDownload(myDay, myHour, myMinute):
    while True:
    day = datetime.datetime.now().strftime("%A")
    hour = datetime.datetime.now().strftime("%H")
    minute = datetime.datetime.now().strftime("%M")
    if day == myDay and str(int(hour)) == myHour and str(int(minute)) == myMinute:
       DownloadButton.invoke()
       break
    root.after(60000, autoDownload(clickedDays.get(), HourSpin.get(), MinSpin.get()))

Using just .after results in

Python: maximum recursion depth exceeded while calling a Python object

, and the while loop gets stuck when the condition is met, continuously invoking DownloadButton.

Additionally, on OS X, if a button function takes longer than a few seconds, the script appears as "not responding." Is there a solution to this issue as well?

I appreciate anyone who has taken the time to read my inquiry and may be able to offer assistance. Thank you!

python python-3.x tkinter scheduled-tasks

Answer 1

Answer №1

Your code has a couple of issues that need to be addressed. First off, you should remove the while True loop as Tkinter's mainloop already takes care of running an infinite loop.

Secondly, when using the after method, make sure to pass a function instead of calling it directly and passing the result.

To clarify, this:

root.after(60000, scaricaAuto(clickedDays.get(), HourSpin.get(), MinSpin.get()))

... is essentially the same as:

result = scaricaAuto(clicedDays.get(), HourSpin.get(), MinSpin.get())
root.after(60000, result)

Instead, consider passing scaricaAuto as an argument or creating a new function to call your desired function. If going with the former option, remember that you can pass arguments to the function by including them in the after call.

For instance,

root.after(60000, scaricaAuto, clickedDays.get(), HourSpin.get(), MinSpin.get())

Note that this approach will immediately execute the .get() methods instead of waiting for 60 seconds.

A more effective solution would be to modify scaricaAuto not to require any arguments upfront but rather fetch the values when needed:

def scaricaAuto():
    myDay = clickedDays.get()
    myHour = HourSpin.get()
    myMinute = MinSpin.get()

    now = datetime.datetime.now()
    day = now.strftime("%A")
    hour = now.strftime("%H")
    minute = now.strftime("%M")

    if day == myDay and str(int(hour)) == myHour and str(int(minute)) == myMinute:
       DownloadButton.invoke()
    root.after(60000, scaricaAuto)

The above implementation will continue to run as long as the GUI application is active, assuming that you have previously invoked mainloop.

Answer 2

Your code has a couple of issues that need to be addressed. First off, you should remove the while True loop as Tkinter's mainloop already takes care of running an infinite loop.

Secondly, when using the after method, make sure to pass a function instead of calling it directly and passing the result.

To clarify, this:

root.after(60000, scaricaAuto(clickedDays.get(), HourSpin.get(), MinSpin.get()))

... is essentially the same as:

result = scaricaAuto(clicedDays.get(), HourSpin.get(), MinSpin.get())
root.after(60000, result)

Instead, consider passing scaricaAuto as an argument or creating a new function to call your desired function. If going with the former option, remember that you can pass arguments to the function by including them in the after call.

For instance,

root.after(60000, scaricaAuto, clickedDays.get(), HourSpin.get(), MinSpin.get())

Note that this approach will immediately execute the .get() methods instead of waiting for 60 seconds.

A more effective solution would be to modify scaricaAuto not to require any arguments upfront but rather fetch the values when needed:

def scaricaAuto():
    myDay = clickedDays.get()
    myHour = HourSpin.get()
    myMinute = MinSpin.get()

    now = datetime.datetime.now()
    day = now.strftime("%A")
    hour = now.strftime("%H")
    minute = now.strftime("%M")

    if day == myDay and str(int(hour)) == myHour and str(int(minute)) == myMinute:
       DownloadButton.invoke()
    root.after(60000, scaricaAuto)

The above implementation will continue to run as long as the GUI application is active, assuming that you have previously invoked mainloop.

Learn how to use tkinter to set up a weekly task schedule starting from a user-selected date

Answer №1

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Learn how to use tkinter to set up a weekly task schedule starting from a user-selected date

Answer №1

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