Source Code for Module lacewing.bitdict

 1  # Copyright (c) 2011 Mathias Kaerlev. 
 2  # See LICENSE for details. 
 3   
 4 -class BitDict(object): 
 5      keys = None 
 6      flags = 0 
 7   
 8 -    def __init__(self, *arg): 
 9          if arg[0] is False: 
10              return 
11          self.keys = dict([(item, index) for (index, item) in enumerate(arg)]) 
12       
13 -    def __getitem__(self, key): 
14          return self.flags & (2 ** self.keys[key]) != 0 
15       
16 -    def __setitem__(self, key, value): 
17          if value: 
18              self.flags |= 2**self.keys[key] 
19          else: 
20              self.flags &= ~2**self.keys[key] 
21       
22 -    def iteritems(self): 
23          for key, index in self.keys.iteritems(): 
24              yield key, self[key] 
25       
26 -    def setFlags(self, flags): 
27          self.flags = flags 
28       
29 -    def getFlags(self): 
30          return self.flags 
31       
32 -    def copy(self): 
33          newDict = BitDict(False) 
34          newDict.keys = self.keys 
35          return newDict 
36       
37 -    def __str__(self): 
38          actual_dict = {} 
39          for key in self.keys: 
40              actual_dict[key] = self[key] 
41          return '%s' % actual_dict 
42       
43 -    def __repr__(self): 
44          return str(self) 
45