Merged r9481:9518 on jblum/grc_reorganize into trunk. Reorganized grc source under...
[debian/gnuradio] / grc / src / utils / __init__.py
1 """
2 Copyright 2008 Free Software Foundation, Inc.
3 This file is part of GNU Radio
4
5 GNU Radio Companion is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
9
10 GNU Radio Companion is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
18 """
19
20 from UserDict import DictMixin
21
22 class odict(DictMixin):
23
24         def __init__(self, d={}):
25                 self._keys = list(d.keys())
26                 self._data = dict(d.copy())
27
28         def __setitem__(self, key, value):
29                 if key not in self._data:
30                         self._keys.append(key)
31                 self._data[key] = value
32
33         def __getitem__(self, key):
34                 return self._data[key]
35
36         def __delitem__(self, key):
37                 del self._data[key]
38                 self._keys.remove(key)
39
40         def keys(self):
41                 return list(self._keys)
42
43         def copy(self):
44                 copy_dict = odict()
45                 copy_dict._data = self._data.copy()
46                 copy_dict._keys = list(self._keys)
47                 return copy_dict
48
49 def exists_or_else(d, key, alt):
50         if d.has_key(key): return d[key]
51         else: return alt
52
53 def listify(d, key):
54         obj = exists_or_else(d, key, [])
55         if isinstance(obj, list): return obj
56         return [obj]