attrdict.py revision 5467:6d9df90d70d7 
1# Copyright (c) 2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Nathan Binkert
28
29__all__ = [ 'attrdict', 'optiondict' ]
30
31class attrdict(dict):
32    def __getattr__(self, attr):
33        if attr in self:
34            return self.__getitem__(attr)
35        return super(attrdict, self).__getattribute__(attr)
36
37    def __setattr__(self, attr, value):
38        if attr in dir(self):
39            return super(attrdict, self).__setattr__(attr, value)
40        return self.__setitem__(attr, value)
41
42    def __delattr__(self, attr):
43        if attr in self:
44            return self.__delitem__(attr)
45        return super(attrdict, self).__delattr__(attr, value)
46
47class optiondict(attrdict):
48    def __getattr__(self, attr):
49        try:
50            return super(optiondict, self).__getattr__(attr)
51        except AttributeError:
52            #d = optionsdict()
53            #setattr(self, attr, d)
54            return None
55
56if __name__ == '__main__':
57    x = attrdict()
58    x.y = 1
59    x['z'] = 2
60    print x['y'], x.y
61    print x['z'], x.z
62    print dir(x)
63    print x
64
65    print
66
67    del x['y']
68    del x.z
69    print dir(x)
70    print(x)
71