allow-positive-integers.md

title	description	author	tags
Allow Positive Integers	A validation function to allow only positive integers.	Legopitstop	validation,positive,integers

from tkinter import Tk, Entry


def allow_positive_integers(value):
    return value.isdigit() and (value == "" or int(value) > 0)


# Usage:
root = Tk()
root.geometry("200x200")

reg = root.register(allow_positive_integers)
Entry(root, validate="key", validatecommand=(reg, "%P")).pack()

root.mainloop()