# ThresholdFilter **`class ThresholdFilter(config)`** Bases: [`Filter`](squirro.lib.nlp.steps.filters.Filter.md#squirro.lib.nlp.steps.filters.Filter) The threshold [`Filter`](squirro.lib.nlp.steps.filters.Filter.md#squirro.lib.nlp.steps.filters.Filter) removes weighted facets with values below threshold. **Input** - all input fields need to be of type [`list`](https://docs.python.org/3.11/library/stdtypes.html#list) [[`dict`](https://docs.python.org/3.11/library/stdtypes.html#dict)] or [`dict`](https://docs.python.org/3.11/library/stdtypes.html#dict) containing { [`str`](https://docs.python.org/3.11/library/stdtypes.html#str) : [`int`](https://docs.python.org/3.11/library/functions.html#int) or [`float`](https://docs.python.org/3.11/library/functions.html#float)}. **Output - the output fields data format differs in the step config:** - skip:True: No specific output format due to removal or marking to skip of the whole [`Document`](../technical/libnlp/base.md#squirro.lib.nlp.document.Document) if threshold isn’t met. - flatten:False: all output fields are filled with data of type [`list`](https://docs.python.org/3.11/library/stdtypes.html#list) [[`dict`](https://docs.python.org/3.11/library/stdtypes.html#dict)] or [`dict`](https://docs.python.org/3.11/library/stdtypes.html#dict) containing {[`str`](https://docs.python.org/3.11/library/stdtypes.html#str) : [`int`](https://docs.python.org/3.11/library/functions.html#int) or [`float`](https://docs.python.org/3.11/library/functions.html#float)}. - flatten:True: all output fields are filled with data of type [`list`](https://docs.python.org/3.11/library/stdtypes.html#list) [[`str`](https://docs.python.org/3.11/library/stdtypes.html#str)] or [`str`](https://docs.python.org/3.11/library/stdtypes.html#str). Parameters - `type` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)) – threshold - `field` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)`, ``None`) – Field to threshold - `fields` ([`list`](https://docs.python.org/3.11/library/stdtypes.html#list)`, ``None`) – List of fields to threshold - `input_fields` ([`list`](https://docs.python.org/3.11/library/stdtypes.html#list)`, ``None`) – List of fields to threshold from - `output_fields` ([`list`](https://docs.python.org/3.11/library/stdtypes.html#list)`, ``None`) – List of fields to threshold to - `flatten` ([`bool`](https://docs.python.org/3.11/library/functions.html#bool)`, ``False`) – Whether or not to flatten the thresholded fields respectively remove the value of the dict in the field. - `excluded_values` ([`list`](https://docs.python.org/3.11/library/stdtypes.html#list)`, ``[``]`) – Values that will not count towards the threshold. - `threshold` ([`float`](https://docs.python.org/3.11/library/functions.html#float)`, ``0.5`) – Value under which the field will be removed. - `skip` ([`bool`](https://docs.python.org/3.11/library/functions.html#bool)`, ``True`) – Whether or not to skip a doc below threshold. **Example** ```json { "step": "filter", "type": "threshold", "fields": ["prediction"], "flatten": true, "threshold": 0.5 } ``` Methods SummaryMethods Documentation **`process_doc(doc)`** Process a document Parameters `doc` ([`Document`](../technical/libnlp/base.md#squirro.lib.nlp.document.Document)) – Document Returns Processed document Return type [Document](../technical/libnlp/base.md#squirro.lib.nlp.document.Document)