# ProximityValidation **`class ProximityValidation(config)`** Bases: [`Analyzer`](squirro.lib.nlp.steps.analyzers.Analyzer.md#squirro.lib.nlp.steps.analyzers.Analyzer) The proximity validation [`Analyzer`](squirro.lib.nlp.steps.analyzers.Analyzer.md#squirro.lib.nlp.steps.analyzers.Analyzer) creates the necessary files for the metrics and confusion matrix in the AI Studio Validation screens. **Intput** - the content of the label_field and the tag_field field needs to be of type [`list`](https://docs.python.org/3.11/library/stdtypes.html#list) [ [`list`](https://docs.python.org/3.11/library/stdtypes.html#list) [ [`str`](https://docs.python.org/3.11/library/stdtypes.html#str) ] ]. Only the 1st element of the 2nd level list is incorporated. In addition, the 1st level lists of both fields needs to be of same length. **Output** - there is no output field, the validation info is stored in the kfold_validation.json file. Parameters - `type` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)) – proximity_validation - `input_field` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)`, ``None`) – Field to use as original text Deprecated since version 3.6.3. - `input_fields` ([`list`](https://docs.python.org/3.11/library/stdtypes.html#list)`, ``None`) – List of fields to use as original text Deprecated since version 3.6.3. - `not_class` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)`, ``None`) – This class includes all neg/opposite elements, which do not belong to any other class **Example** ```json { "step": "analyzer", "type": "proximity_validation", "label_field": "label", "tag_field": "prediction" } ``` Methods SummaryMethods Documentation **`process(docs)`** Process a set of documents Parameters `docs` (`generator``(`[`Document`](../technical/libnlp/base.md#squirro.lib.nlp.document.Document)`)`) – Generator of documents Returns Analysis Return type [dict](https://docs.python.org/3.11/library/stdtypes.html#dict) **`train(docs)`** Train on a step of a set of documents Parameters `docs` (`generator``(`[`Document`](../technical/libnlp/base.md#squirro.lib.nlp.document.Document)`)`) – Generator of documents Returns Generator of processed documents Return type generator([Document](../technical/libnlp/base.md#squirro.lib.nlp.document.Document))