1 #!/usr/bin/env python 2 3 """ 4 Operator support. 5 6 Copyright (C) 2010, 2013, 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 from operator.core import unary_op 23 24 # These functions defer method lookup by wrapping the attribute access in 25 # lambda functions. Thus, the appropriate methods are defined locally, but no 26 # attempt to obtain them is made until the generic function is called. 27 28 # Unary operator functions. 29 30 def invert(a): 31 return unary_op(a, lambda a: a.__invert__) 32 33 def neg(a): 34 return unary_op(a, lambda a: a.__neg__) 35 36 def not_(a): 37 return not a 38 39 def pos(a): 40 return unary_op(a, lambda a: a.__pos__) 41 42 # vim: tabstop=4 expandtab shiftwidth=4
