dfc2483e3e
when the user wants to keep some structure in the result, the `ouptut` option allows to return a `dict` with the matched keys as keys and corresponding values as values.
32 lines
1.3 KiB
Python
32 lines
1.3 KiB
Python
from six import iteritems
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def nested_lookup(key, document, wild=False, output='dict'):
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"""Lookup a key in a nested document, return a list of values"""
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if output == 'dict':
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return dict(_nested_lookup(key, document, wild=wild, output=output))
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elif output == 'list':
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return list(_nested_lookup(key, document, wild=wild, output=output))
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else:
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raise ValueError('Output is of unknown type '+output)
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def _nested_lookup(key, document, wild=False, output='dict'):
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"""Lookup a key in a nested document, yield a value"""
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if isinstance(document, list):
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for d in document:
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for result in _nested_lookup(key, d, wild=wild):
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yield result
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if isinstance(document, dict):
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for k, v in iteritems(document):
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if key == k or (wild and key.lower() in k.lower()):
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if output == 'dict':
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yield k, v
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elif output == 'list':
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yield v
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elif isinstance(v, dict):
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for result in _nested_lookup(key, v, wild=wild, output=output):
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yield result
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elif isinstance(v, list):
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for d in v:
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for result in _nested_lookup(key, d, wild=wild, output=output):
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yield result
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