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I'm using tkinter and this problem bothers me a lot. My goal:

  1. Create several buttons
  2. When clicking a specific button, change the text shown on that button

I tried the codes below, but no matter what button I clicked, only the last one got changed.

import tkinter as tk

list1 = []

def update_btn_text(index):
   list1[index].set('new')
   
for i in range(10):
   btn_text = tk.StringVar()
   list1.append(btn_text)
   btn = tk.Button(root, textvariable=list1[i], command=lambda: update_btn_text(i))
   btn_text.set('button' + str(i+1))
   btn.pack()

root.mainloop()

I guess the problem is because of the i value, but how can I fix it? Thanks a lot!

zhmff
  • 3
  • 1

1 Answers1

1

You have to create a local variable for every iteration and pass it as a value in updatd_btn_text()

command=lambda i=i: update_btn_text(i)

Also you could try this for configuring text of the button

def update_btn_text(index,button):
   button.config(text=list1[index])
   
for i in range(10):
   btn = tk.Button(root)
   btn.pack()
   btn.config (command=lambda i=i, btn=btn: update_btn_text(i, btn))