Python Flask: Getting An Error When Server Shutdown Is Declined

I am a newbie at FLask. I am building an app which uses Flask as framework. the app and server is supposed to work only on localhost. When exiting the app I also want to shutdown t

Solution 1:

You need to destroy the Tk() instance after closing the messagebox:

def dialog_yn(title="mesage Box", prompt="Make your choice"):
    root = Tk()
    root.withdraw()
    result = messagebox.askquestion(title=title, message=prompt, icon='warning')
    root.destroy()
    return result