00001 """
00002 Copyright 2008 Free Software Foundation, Inc.
00003 This file is part of GNU Radio
00004
00005 GNU Radio Companion is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU General Public License
00007 as published by the Free Software Foundation; either version 2
00008 of the License, or (at your option) any later version.
00009
00010 GNU Radio Companion is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00013 GNU General Public License for more details.
00014
00015 You should have received a copy of the GNU General Public License
00016 along with this program; if not, write to the Free Software
00017 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
00018 """
00019
00020
00021
00022
00023 from UserDict import DictMixin
00024
00025 class odict(DictMixin):
00026
00027 def __init__(self, d={}):
00028 self._keys = list(d.keys())
00029 self._data = dict(d.copy())
00030
00031 def __setitem__(self, key, value):
00032 if key not in self._data:
00033 self._keys.append(key)
00034 self._data[key] = value
00035
00036 def __getitem__(self, key):
00037 return self._data[key]
00038
00039 def __delitem__(self, key):
00040 del self._data[key]
00041 self._keys.remove(key)
00042
00043 def keys(self):
00044 return list(self._keys)
00045
00046 def copy(self):
00047 copy_dict = odict()
00048 copy_dict._data = self._data.copy()
00049 copy_dict._keys = list(self._keys)
00050 return copy_dict
00051
00052 def exists_or_else(d, key, alt):
00053 if d.has_key(key): return d[key]
00054 else: return alt
00055
00056 def listify(d, key):
00057 obj = exists_or_else(d, key, [])
00058 if isinstance(obj, list): return obj
00059 return [obj]
00060
