restrict user input to numerical values

[MCL169]

while True:
    year = input('please enter a 4-digit year: ')

    digit = len(year)

    if digit != 4 and year != int:
        print("sorry, that was bad input")
    else:
        print(f"thanks ! your value is {year}")
        break

I want to only except 4 character inputs or display error with the prompt again, which is working but i also need input to be only numeric values. Len wont work on int so im stuck.

Yoriz write Apr-08-2023, 04:54 PM:
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[Yoriz]

Maybe you could use the strings isdigit method

if digit != 4  or not year.isdigit():

[MCL169]

Maybe you could use the strings isdigit method

if digit != 4  or not year.isdigit():

That did the trick Thanks!