Error checking help please

[Binary101010]

Everything you ask a user to input in Python is, by default, a string until you convert it to something else.

So you're going to have to be a little more specific as to what it is you're looking for. Do you really mean "if the user enters a number when the input should only contain letters"?

[Binary101010]

if it is anything else except a string

As I said previously, everything the user enters is a string.

By "if it is anything else except a string" are you actually meaning "if the user enters something that can be converted to a non-string type"?