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# recursive_dictionary.py |
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# Created 2009-05-20 by Jannis Andrija Schnitzer. |
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# |
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# Copyright (c) 2009 Jannis Andrija Schnitzer |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included in |
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# all copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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# THE SOFTWARE. |
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__author__ = '[email protected] (Jannis Andrija Schnitzer)' |
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__author__ = '[email protected] (Jannis Andrija Schnitzer)' |
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class RecursiveDictionary(dict): |
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"""RecursiveDictionary provides the methods rec_update and iter_rec_update |
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that can be used to update member dictionaries rather than overwriting |
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them.""" |
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def rec_update(self, other, **third): |
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"""Recursively update the dictionary with the contents of other and |
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third like dict.update() does - but don't overwrite sub-dictionaries. |
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Example: |
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>>> d = RecursiveDictionary({'foo': {'bar': 42}}) |
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>>> d.rec_update({'foo': {'baz': 36}}) |
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>>> d |
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{'foo': {'baz': 36, 'bar': 42}} |
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""" |
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try: |
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iterator = other.iteritems() |
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except AttributeError: |
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iterator = other |
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self.iter_rec_update(iterator) |
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self.iter_rec_update(third.iteritems()) |
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def iter_rec_update(self, iterator): |
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for (key, value) in iterator: |
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if key in self and \ |
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isinstance(self[key], dict) and isinstance(value, dict): |
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self[key] = RecursiveDictionary(self[key]) |
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self[key].rec_update(value) |
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else: |
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self[key] = value |
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def __repr__(self): |
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return super(self.__class__, self).__repr__() |