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

Instead of calling inputValue recursively, you need to replace raw_input with your own function with validation and retry. Something like this:

def user_int(msg):
  try:
    return int(raw_input(msg))
  except ValueError:
    return user_int("Entered value is invalid, please try again")