> Does python have andmap and ormap: > > andmap((lambda t: boolean(t)),L) > > gives True if boolean(t) is True for all t in L and False otherwise? > And > > ormap((lambda t: boolean(t)),L) > > gives True if boolean(t) is True for some t in L and False otherwise? > One can use a list comprehension like > > [x for x in L if not(False in map((lambda t: boolean(t)),L))] > > as an example of selection by andmap, and > > [x for x in L if (True in map((lambda t: boolean(t)),L))] > > as an example of selection by ormap. > > How does one define andmap/ormap so its first argument is a boolean > procedure or lambda? > > def andmap(b,L): > if False in map(b,L): return False > else: return True > > def ormap(b,L): > if True in map(b,L): return True > else: return False
import operator reduce(operator.and_, [predcidate(o) for o in objects]) predicate can be a lambda, if it has to be. Diez -- http://mail.python.org/mailman/listinfo/python-list
