tkinter: Open a new window with a button prompt

Question

How would I be able to open a new window by the user pressing a button in a tkinter GUI? I only need quite simple solutions, and if the code could be explained as well that would be great.

Solution

Here's the nearly shortest possible solution to your question. The solution works in python 3.x. For python 2.x change the import to Tkinter rather than tkinter (the difference being the capitalization):

import tkinter as tk
#import Tkinter as tk  # for python 2
    
def create_window():
    window = tk.Toplevel(root)

root = tk.Tk()
b = tk.Button(root, text="Create new window", command=create_window)
b.pack()

root.mainloop()

This is definitely not what I recommend as an example of good coding style, but it illustrates the basic concepts: a button with a command, and a function that creates a window.

Comments

[Avinash Raj]

I tried this solution, it works but I have the second window which uses grid.. And thus this err TclError: cannot use geometry manager grid inside . which already has slaves managed by pac

[Anarach]

@AvinashRaj You cannot use both .pack() and .grid() in same code. change your .pack() to .grid()

[Rishabh Deep Singh]

How Do I add more features to the new window?

[Russell Smith]

@RishabhDeepSingh: use window as the master for additional widgets.