Lichen

lib/__builtins__/iteration/enumeration.py

932:c07b0dd14f85
12 months ago Paul Boddie Moved integer instantiation support to library functions.
     1 #!/usr/bin/env python     2      3 """     4 Enumeration-related functions.     5      6 Copyright (C) 2015, 2016, 2017 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 def enumerate(iterable, start=0):    23     24     """    25     Iterate over 'iterable', obtaining items and combining them with position    26     information, producing a sequence containing tuples of the form    27     (position, item). The first position is indicated by 'start' (which is zero    28     by default) and each subsequent positions is incremented from the one    29     preceding it.    30     """    31     32     l = []    33     pos = start    34     35     for i in iterable:    36         l.append((pos, i))    37         pos += 1    38     39     return l    40     41 # vim: tabstop=4 expandtab shiftwidth=4