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1
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# Dictionaries
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3
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import itertools
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4
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5
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class IdDict(dict):
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'''A dict that stores objects by id()'''
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def add(self, *values):
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for value in values: self[id(value)] = value
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return self
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def add_vars(self, vars_): return self.add(*vars_.values())
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13
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14
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class MergeDict:
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'''A dict that checks each of several dicts'''
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def __init__(self, *dicts): self.dicts = dicts
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def __getitem__(self, key):
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for dict_ in self.dicts:
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try: return dict_[key]
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except KeyError: pass
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raise # reraise last KeyError
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