> I assumed that all standard sequence consumers (including list, of course) would intercept > the StopIteration of a sequence given them in the form of a generator expression, so your > lyst example would have an analogue for other sequence consumers as well, right? > I.e., there's not a hidden list(genex) in those others I would hope ;-)
Right. > E.g., "in" in my toy exposed more clearly, using Peter's stop: > > >>> def show(x): print x,; return x > ... > >>> def stop(): raise StopIteration > ... > >>> 2 in (x for x in xrange(5) if show(x)<4 or stop()) > 0 1 2 > True > >>> 7 in (x for x in xrange(5) if show(x)<4 or stop()) > 0 1 2 3 4 > False > > BTW I notice that this also nicely shortcuts when the 2 is found. That's a fact. Raymond -- http://mail.python.org/mailman/listinfo/python-list
