Python 2.7 try and except ValueError

Question

I query user input which is expected to be an int by using int(raw_input(...))

However when the user doesn\'t enter an integer, i.e. just hits return, I get a ValueError

Answer 1

A quick and dirty solution is:

parsed = False
while not parsed:
    try:
        x = int(raw_input('Enter the value:'))
        parsed = True # we only get here if the previous line didn't throw an exception
    except ValueError:
        print 'Invalid value!'

This will keep prompting the user for input until parsed is True which will only happen if there was no exception.