1 #!/usr/bin/env python 2 3 """ 4 Iterator objects. 5 6 Copyright (C) 2015 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 class listiterator(object): 23 24 "Implementation of listiterator." 25 26 def __init__(self, l): 27 28 "Initialise with the given list 'l'." 29 30 self.l = l 31 self.i = 0 32 33 def next(self): 34 35 "Return the next item." 36 37 try: 38 value = self.l[self.i] 39 self.i += 1 40 return value 41 except IndexError: 42 raise StopIteration() 43 44 # vim: tabstop=4 expandtab shiftwidth=4
