1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/lib/__builtins__/iteration/enumeration.py Thu Feb 02 22:38:26 2017 +0100
1.3 @@ -0,0 +1,41 @@
1.4 +#!/usr/bin/env python
1.5 +
1.6 +"""
1.7 +Enumeration-related functions.
1.8 +
1.9 +Copyright (C) 2015, 2016, 2017 Paul Boddie <paul@boddie.org.uk>
1.10 +
1.11 +This program is free software; you can redistribute it and/or modify it under
1.12 +the terms of the GNU General Public License as published by the Free Software
1.13 +Foundation; either version 3 of the License, or (at your option) any later
1.14 +version.
1.15 +
1.16 +This program is distributed in the hope that it will be useful, but WITHOUT
1.17 +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.18 +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.19 +details.
1.20 +
1.21 +You should have received a copy of the GNU General Public License along with
1.22 +this program. If not, see <http://www.gnu.org/licenses/>.
1.23 +"""
1.24 +
1.25 +def enumerate(iterable, start=0):
1.26 +
1.27 + """
1.28 + Iterate over 'iterable', obtaining items and combining them with position
1.29 + information, producing a sequence containing tuples of the form
1.30 + (position, item). The first position is indicated by 'start' (which is zero
1.31 + by default) and each subsequent positions is incremented from the one
1.32 + preceding it.
1.33 + """
1.34 +
1.35 + l = []
1.36 + pos = start
1.37 +
1.38 + for i in iterable:
1.39 + l.append((pos, i))
1.40 + pos += 1
1.41 +
1.42 + return l
1.43 +
1.44 +# vim: tabstop=4 expandtab shiftwidth=4