On Mon, Jan 19, 2009 at 1:41 PM, Scott Dial <scott+python-...@scottdial.com> wrote: > Vitor Bosshard wrote: >> Are you even sure the list comprehension doesn't already shortcut evaluation? > > It does not. The body of the comprehension is evaluated all the way to > completion, ..
In addition, the test is evaluated on all items as well: >>> def test(i): ... print "testing", i ... return i**2 < 10 ... >>> a = (i for i in range(10) if test(i)) >>> a.next() testing 0 0 >>> a.next() testing 1 1 >>> a.next() testing 2 2 >>> a.next() testing 3 3 >>> a.next() testing 4 testing 5 testing 6 testing 7 testing 8 testing 9 Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
