How to determine the right numbers without error?

Question

Python

The code

elif int(message.text) <= 14:

Everything is fine when a number is entered, but when sending any other text (except other keywords) it crashes with an error.

Mistake

elif  int(message.text) <= 14:
ValueError: invalid literal for int() with base 10: 'выфв'

Answer 1

Use string method isdigit()
https://pythonz.net/references/named/str.isdigit/

if message.text.isdigit():
    if int(message.text) <= 14:

Answer 2

Or use try/catch.