How to Open a New Window With a Button in Python Tkinter

In this tutorial, we are going to see how to open a new window with a button in Python Tkinter. Usually we use tk.Tk() to create a new Tkinter window, but this is not valid if we have already created a root window.
 

How to Open a New Window With a Button in Python Tkinter

In the following example, we will use the Toplevel widget, because the Toplevel widget is intended to display additional ‘pop-up’ windows.
 

 

from tkinter import *   

def create():
    win = Toplevel(root)

root = Tk()
root.geometry('200x100')  

btn = Button(root, text="Create a new window", command = create)
btn.pack(pady = 10) 

root.mainloop()

Output:

 
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