1# Copyright (c) 2005 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

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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
29from __future__ import print_function
30
31__all__ = [ 'multidict' ]
32
33class multidict(object):
34 def __init__(self, parent = {}, **kwargs):
35 self.local = dict(**kwargs)
36 self.parent = parent
37 self.deleted = {}
38

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113 try:
114 return self[key]
115 except KeyError:
116 self.deleted.pop(key, False)
117 self.local[key] = default
118 return default
119
120 def _dump(self):
121 print('multidict dump')
122 node = self
123 while isinstance(node, multidict):
124 print(' ', node.local)
125 node = node.parent
126
127 def _dumpkey(self, key):
128 values = []
129 node = self
130 while isinstance(node, multidict):
131 if key in node.local:
132 values.append(node.local[key])
133 node = node.parent
134 print(key, values)
135
136if __name__ == '__main__':
137 test1 = multidict()
138 test2 = multidict(test1)
139 test3 = multidict(test2)
140 test4 = multidict(test3)
141
142 test1['a'] = 'test1_a'

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147
148 test2['a'] = 'test2_a'
149 del test2['b']
150 test2['c'] = 'test2_c'
151 del test1['a']
152
153 test2.setdefault('f', multidict)
154
155 print('test1>', test1.items())
156 print('test2>', test2.items())
157 #print(test1['a'])
158 print(test1['b'])
159 print(test1['c'])
160 print(test1['d'])
161 print(test1['e'])
162
163 print(test2['a'])
164 #print(test2['b'])
165 print(test2['c'])
166 print(test2['d'])
167 print(test2['e'])
168
169 for key in test2.iterkeys():
170 print(key)
171
172 test2.get('g', 'foo')
173 #test2.get('b')
174 test2.get('b', 'bar')
175 test2.setdefault('b', 'blah')
176 print(test1)
177 print(test2)
178 print(`test2`)
179
180 print(len(test2))
181
182 test3['a'] = [ 0, 1, 2, 3 ]
183
184 print(test4)