#!/usr/bin/python str = "THIS IS STRING EXAMPLE....WOW!!!"; print str.isupper(); str = "THIS is string example....wow!!!"; print str.isupper(); fuente: http://www.tutorialspoint.com/python/string_isupper.htm Si queres saber cuantos caracteres son mayusculas ? cad = "Hola Mundo" sum([x.isupper() for x in cad]) Esto es "a la python" . -- Gustavo C