0

I am building an app that requires people to put numbers into entry boxes, I am using tkinter, on IDLE 3, and I was wondering if there is a way to make it so people can't put letters into the entry boxes? I want numbers to be the only thing able to be put into the text boxes.

Cœur
  • 37,241
  • 25
  • 195
  • 267
user3605110
  • 1
  • 1
  • If tkinter is anything like wxpython, there should be an event whenever the user edits the box. Make that event handler check if there are any invalid characters – wnnmaw May 08 '14 at 19:00

1 Answers1

-1

The best way is, you can use try/except method. Try to convert user input using int, if no exception raised, then you're good to go (as you want only numbers). On the other hand if an exception is raised, do something else:

# suppose the input is stored in the variable 'user_input'
try:
    int(user_input)
except ValueError:
    # do something else
Ahmed Sadman
  • 105
  • 10