jina.drivers.querylang.queryset.dunderkey¶
Originally from https://github.com/naiquevin/lookupy
The library is provided as-is under the MIT License
Copyright (c) 2013 Vineet Naik (naikvin@gmail.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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jina.drivers.querylang.queryset.dunderkey.
dunderkey
(*args)[source]¶ Produces a nested key from multiple args separated by double underscore
>>> dunderkey('a', 'b', 'c') >>> 'a__b__c'
:param *args : *String :rtype : String
- Return type
str
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jina.drivers.querylang.queryset.dunderkey.
dunder_partition
(key)[source]¶ Splits a dunderkey into 2 parts
The first part is everything before the final double underscore The second part is after the final double underscore
>>> dunder_partition('a__b__c') >>> ('a__b', 'c')
:param neskey : String :rtype : 2 Tuple
- Return type
Tuple
[str
,Optional
[str
]]
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jina.drivers.querylang.queryset.dunderkey.
dunder_init
(key)[source]¶ Returns the initial part of the dunder key
>>> dunder_init('a__b__c') >>> 'a__b'
:param neskey : String :rtype : String
- Return type
str
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jina.drivers.querylang.queryset.dunderkey.
dunder_last
(key)[source]¶ Returns the last part of the dunder key
>>> dunder_last('a__b__c') >>> 'c'
:param neskey : String :rtype : Optional String
- Return type
Optional
[str
]
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jina.drivers.querylang.queryset.dunderkey.
dunder_get
(_dict, key)[source]¶ Returns value for a specified dunderkey
A “dunderkey” is just a fieldname that may or may not contain double underscores (dunderscores!) for referencing nested keys in a dict. eg:
>>> data = {'a': {'b': 1}} >>> dunder_get(data, 'a__b') 1
key ‘b’ can be referrenced as ‘a__b’
:param _dict : (dict, list, struct or object) which we want to index into :param key : (str) that represents a first level or nested key in the dict :rtype : (mixed) value corresponding to the key
- Return type
Any
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jina.drivers.querylang.queryset.dunderkey.
undunder_keys
(_dict)[source]¶ Returns dict with the dunder keys converted back to nested dicts
eg:
>>> undunder_keys({'a': 'hello', 'b__c': 'world'}) {'a': 'hello', 'b': {'c': 'world'}}
:param _dict : (dict) flat dict :rtype : (dict) nested dict
- Return type
Dict
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jina.drivers.querylang.queryset.dunderkey.
dunder_truncate
(_dict)[source]¶ Returns dict with dunder keys truncated to only the last part
In other words, replaces the dunder keys with just last part of it. In case many identical last parts are encountered, they are not truncated further
eg:
>>> dunder_truncate({'a__p': 3, 'b__c': 'no'}) {'c': 'no', 'p': 3} >>> dunder_truncate({'a__p': 'yay', 'b__p': 'no', 'c__z': 'dunno'}) {'a__p': 'yay', 'b__p': 'no', 'z': 'dunno'}
:param _dict : (dict) to flatten :rtype : (dict) flattened result
- Return type
Dict