Re: [Zope] How to check if a string contains some characters??

Marcello asked:

Is there a simple way to check if a string contain only this values: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_" and otherwise raise an error?

Why have all the responses so far been so excessively complex? This looks like an ideal candidate for string.translate. Input: <dtml-var input missing="not set"><br> <dtml-if input> <dtml-let valid="_.string.letters+_.string.digits + '.-_'" badchars="_.string.translate(input, _.string.maketrans(' ', ' '), valid)"> <dtml-if badchars> Sorry, you aren't allowed those characters (<dtml-var badchars html_quote>) <dtml-else>Nice string </dtml-if> </dtml-let> </dtml-if>