summaryrefslogtreecommitdiff
path: root/src/python/m5/util/attrdict.py
blob: 3336632f5b66a86c5e0fd5fbecd7bf68b575143c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
# Copyright (c) 2006 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert

__all__ = [ 'attrdict', 'multiattrdict', 'optiondict' ]

class attrdict(dict):
    """Wrap dict, so you can use attribute access to get/set elements"""
    def __getattr__(self, attr):
        if attr in self:
            return self.__getitem__(attr)
        return super(attrdict, self).__getattribute__(attr)

    def __setattr__(self, attr, value):
        if attr in dir(self) or attr.startswith('_'):
            return super(attrdict, self).__setattr__(attr, value)
        return self.__setitem__(attr, value)

    def __delattr__(self, attr):
        if attr in self:
            return self.__delitem__(attr)
        return super(attrdict, self).__delattr__(attr)

    def __getstate__(self):
        return dict(self)

    def __setstate__(self, state):
        self.update(state)

class multiattrdict(attrdict):
    """Wrap attrdict so that nested attribute accesses automatically create
    nested dictionaries."""
    def __getattr__(self, attr):
        try:
            return super(multiattrdict, self).__getattr__(attr)
        except AttributeError:
            d = optiondict()
            setattr(self, attr, d)
            return d

class optiondict(attrdict):
    """Modify attrdict so that a missing attribute just returns None"""
    def __getattr__(self, attr):
        try:
            return super(optiondict, self).__getattr__(attr)
        except AttributeError:
            return None

if __name__ == '__main__':
    x = attrdict()
    x.y = 1
    x['z'] = 2
    print x['y'], x.y
    print x['z'], x.z
    print dir(x)
    print x

    print

    del x['y']
    del x.z
    print dir(x)
    print(x)

    x = multiattrdict()
    x.y.z = 9
    print x
    print x.y
    print x.y.z