How to close a Tkinter window by pressing a Button

Question

Write a GUI application with a button labeled  Good-bye   When the  Button is clicked  the window closes    This is my code so far  but it is not working  Can anyone help me out with my code   from Tkinter import    window   Tk    def close window  root        root destroy    frame   Frame window  frame pack   button   Button  frame  text    Good-bye    command   close window  button pack    window mainloop

User · Answer

from tkinter import    window   tk   window geometry  300x300    def close window           window destroy    button   Button   text    Good-bye   command   close window  button pack    window mainloop

User · Answer

With minimal editing to your code  Not sure if they ve taught classes or not in your course   change   def close window root        root destroy     to  def close window         window destroy     and it should work       Explanation   Your version of close window is defined to expect a single argument  namely root   Subsequently  any calls to your version of close window need to have that argument  or Python will give you a run-time error   When you created a Button  you told the button to run close window when it is clicked  However  the source code for Button widget is something like     class constructor def   init   self  some args  command  more args                self command   command             this method is called when the user clicks the button def clicked self                self command     Button calls your function with no arguments             As my code states  the Button class will call your function with no arguments   However your function is expecting an argument  Thus you had an error   So  if we take out that argument  so that the function call will execute inside the Button class  we re left with   def close window         root destroy     That s not right  though  either  because root is never assigned a value   It would be like typing in print x  when you haven t defined x  yet     Looking at your code  I figured you wanted to call destroy on window  so I changed root to window

User · Answer

You can use lambda to pass a reference to the window object as argument to close window function   button   Button  frame  text  Good-bye    command   lambda  close window window     This works because the command attribute is expecting a callable  or callable like object  A lambda is a callable  but in this case it is essentially the result of calling a given function with set parameters   In essence  you re calling the lambda wrapper of the function which has no args  not the function itself

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from tkinter import    def close window        import sys     sys exit    root   Tk    frame   Frame  root  frame pack    button   Button  frame  text  Good-bye   command close window  button pack    mainloop

User · Answer

You can associate directly the function object window destroy to the command attribute of your button   button   Button  frame  text  Good-bye    command window destroy    This way you will not need the function close window to close the window for you

User · Answer

You could create a class that extends the Tkinter Button class  that will be specialised to close your window by associating the destroy method to its command attribute   from tkinter import    class quitButton Button       def   init   self  parent           Button   init   self  parent          self  text      Good Bye            Command to close the window  the destory method          self  command     parent destroy         self pack side BOTTOM   root   Tk   quitButton root  mainloop     This is the output       And the reason why your code did not work before   def close window            root destroy       window destroy     I have a slight feeling you might got the root from some other place  since you did window   tk      When you call the destroy on the window in the Tkinter means destroying the whole application  as your window  root window  is the main window for the application  IMHO  I think you should change your window to root   from tkinter import    def close window        root destroy      destroying the main window  root   Tk   frame   Frame root  frame pack    button   Button frame  button  text     Good-bye   button  command     close window button pack    mainloop

[python] How to close a Tkinter window by pressing a Button?

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