Source Code for Module advene.util.defaultdict

 1  # From ASPN python cookbook 
 2  import copy 
 3   
 4 -class DefaultDict(dict): 
 5      """Dictionary with a default value for unknown keys.""" 
 6 -    def __init__(self, default=None, **items): 
 7          dict.__init__(self, **items) 
 8          self.default = default 
 9   
10 -    def __getitem__(self, key): 
11          if key in self: 
12              return self.get(key) 
13          else: 
14              ## Need copy in case self.default is something like [] 
15              return self.setdefault(key, copy.deepcopy(self.default)) 
16   
17 -    def __copy__(self): 
18          return DefaultDict(self.default, **self) 
19