Marcello asked:
Is there a simple way to check if a string contain only this values: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_" and otherwise raise an error?
If you have a string you want to check, with the name "string_name": <dtml-call "REQUEST.set('char_invalid', 'no')"> <dtml-let chars_valid="'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 .-_'"> <dtml-while "char_valid == 'no'"> <dtml-in string_name> <dtml-if "sequence-item !in chars_valid"> <dtml-call "REQUEST.set('char_invalid', 'yes')"> </dtml-if> </dtml-in> </dtml-while> </dtml-let> <dtml-if "char_invalid == 'no'"> <dtml-call "your raise_error_code"> </dtml-if> This may not look as simple as you want, but in pure Python, (without alls the <dtml-stuff > this would be: string_valid = 'yes' for char in string_name : if char !in 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_' : string_valid = 'no' break if string_valid == 'no' : (run your "raise error" code here) Later, Jerry S.