Lichen

lib/__builtins__/none.py

794:7dd8e4815848
2017-03-31 Paul Boddie Introduced a multiple outcome result which can be used to provide a choice of return values to supply the initialiser and alias details.
     1 #!/usr/bin/env python     2      3 """     4 None objects.     5      6 Copyright (C) 2015, 2016 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 NoneType:    23     24     "The type of the None object."    25     26     def __bool__(self):    27     28         "None is always false."    29     30         return False    31     32     def __str__(self):    33     34         "Return a string representation."    35     36         return "None"    37     38     __repr__ = __str__    39     40 None = NoneType()    41     42 # vim: tabstop=4 expandtab shiftwidth=4