Tkinter: creating an arbitrary number of buttons/widgets

Question

So, I\'ve got a list with entries that look like this:

Option1  Placeholder1    2   Placeholder2    0      
Option2  Placeholder1    4              
Option3  Pla         


        

Answer 1

Figured it out! Creating the widgets dynamically with a dictionary worked just fine, but calling the correct widget on the various button presses was more difficult. This is what I had:

buttons = dict()
for k in range(len(info)):
    buttons[k] = Button(top, text=info[k], command=lambda: my_function(buttons[k]))

... which would work, but all button presses would call the function with the last created button as the target. All that was needed was a few extra characters in the command part of the buttons:

buttons = dict()
for k in range(len(info)):
    buttons[k] = Button(top, text=info[k], command=lambda a=k: my_function(buttons[a]))

... which I assume works because it somehow stores the value of k inside a rather than taking the last known value of k, i.e. equivalent to the last created button. Is this correct?

Answer 2

You can store Buttons in a list:

from tkinter import *
master = Tk()
buttons = []
n = 10
for i in range(n):
    button = Button(master, text = str(i))
    button.pack()
    buttons.append(button)
master.mainloop()