How to call a new window on button click.

Here we will learn how to assign an action to button. 

To assign action, command option needs to be used. A value (method / function) assigned to command will be triggered on button click.

below is the code to destroy the main window on click, GUI will look like as above image

 command = action to perform

to destroy current window,  function_call  needs to assign to command option to open a new window for confirmation to close

(please refer project1 and project2 before going forward) 

 #project to destroy window

 try:
     from Tkinter import *
 except:
     from tkinter import *

 def destroy_win(mw1):
     mw1.destroy()
     mw.destroy()


 def close_window():
     mw1 = Tk()
     mw1.geometry("170x50+365+80")
     mw1.title("AETies")
 
     lbl = Label(mw1, text="confirm to close")
     lbl.pack(side=LEFT)

     btn = Button(mw1, text='confirm', command= lambda:destroy_win(mw1))
     btn.pack(side=LEFT)

     mw1.mainloop()

 mw = Tk()
 mw.geometry("500x100+50+50")
 mw.title("AETies : Automation Expert Technologies")

 label = Label(mw, text='Please click on button to close window')
 label.pack(side=LEFT)
 btn = Button(mw, text='click here', command=close_window)
 btn.pack(side=LEFT)

 mw.mainloop()