64 lines
1.5 KiB
Python
64 lines
1.5 KiB
Python
#
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# This file and source code are in the public domain.
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#
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class odict (dict):
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"""
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A dictionary with ordered keys. Based on the cookbook recipe at:
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747
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"""
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def __init__(self, *larg, **kwarg):
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self._keys = []
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dict.__init__(self, *larg, **kwarg)
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def __delitem__(self, key):
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dict.__delitem__(self, key)
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self._keys.remove(key)
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def __setitem__(self, key, item):
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dict.__setitem__(self, key, item)
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if key not in self._keys:
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self._keys.append(key)
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def clear(self):
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dict.clear(self)
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self._keys = []
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def copy(self):
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od = odict(self)
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return od
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def items(self):
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return zip(self._keys, self.values())
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def iteritems(self):
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for k in self._keys:
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yield k, self[k]
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def keys(self):
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return self._keys[:]
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def popitem(self):
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try:
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key = self._keys[-1]
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except IndexError:
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raise KeyError('dictionary is empty')
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val = self[key]
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del self[key]
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return (key, val)
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def setdefault(self, key, failobj=None):
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if key not in self._keys:
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self._keys.append(key)
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dict.setdefault(self, key, failobj)
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def update(self, d):
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for key, item in d.items():
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self.__setitem__(key, item)
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def values(self):
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return map(self.get, self._keys)
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