>>> {float("nan"), float("nan")} {nan, nan}
except that sometimes it can't: >>> nan = float("nan") >>> {nan, nan} {nan} -- http://mail.python.org/mailman/listinfo/python-list
>>> {float("nan"), float("nan")} {nan, nan}
except that sometimes it can't: >>> nan = float("nan") >>> {nan, nan} {nan} -- http://mail.python.org/mailman/listinfo/python-list