30 lines
903 B
Python
30 lines
903 B
Python
import six
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from collections import defaultdict
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class Aliases(object):
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def __init__(self, aliases):
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self.aliases = aliases
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self.priorities = {k: i for i, k in enumerate(aliases)}
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def key_priority(self, key):
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return self.priorities.get(key, len(self.priorities))
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def get(self, key):
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return self.aliases.get(key)
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def replace(self, components):
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replacements = defaultdict(list)
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values = {}
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for k in list(components):
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new_key = self.aliases.get(k)
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if new_key and new_key not in components:
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value = components.pop(k)
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values[k] = value
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replacements[new_key].append(k)
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for key, source_keys in six.iteritems(replacements):
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source_keys.sort(key=self.key_priority)
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value = values[source_keys[0]]
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components[key] = value
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