Tkinter provides a variety of built-in functions develop interactive and featured GUI (Graphical User Interface).after() function is also a Universal function which can be used directly on the root as well as with other widgets.
after(parent, ms, function = None, *args)
Parameters:
parent: is the object of the widget or main window whichever is using this function.
ms: is the time in milliseconds.
function: which shall be called.
*args: other options.
Code #1:
Python3# importing only those functions which# are neededfromtkinterimportTk,mainloop,TOPfromtkinter.ttkimportButton# time function used to calculate timefromtimeimporttime# creating tkinter windowroot=Tk()button=Button(root,text='Geeks')button.pack(side=TOP,pady=5)print('Running...')# Calculating starting timestart=time()# in after method 5000 milliseconds# is passed i.e after 5 seconds# main window i.e root window will# get destroyedroot.after(5000,root.destroy)mainloop()# calculating end timeend=time()print('Destroyed after% d seconds'%(end-start))Output:
When you run the program it will show a Tkinter window having aButton but after 5 seconds the window gets destroyed.
Code #2: Prompting a message after certain time (in our program after 5 seconds).
Python3# importing only those functions which# are neededfromtkinterimportTk,mainloop,TOPfromtkinter.ttkimportButtonfromtkinter.messageboximport_show# creating tkinter windowroot=Tk()root.geometry('200x100 + 300 + 250')button=Button(root,text='Geeks')button.pack(side=TOP,pady=5)# in after method 5000 milliseconds# is passed i.e after 5 seconds# a message will be promptedroot.after(5000,lambda:_show('Title','Prompting after 5 seconds'))# Destroying root window after 6.7 secondsroot.after(6700,root.destroy)mainloop()Output:
In below output a messagebox will prompt after 5 seconds you can even call any function after a certain period of time by passing the function name.