# LogFieldsDebugger **`class LogFieldsDebugger(config)`** Bases: [`Debugger`](squirro.lib.nlp.steps.debuggers.Debugger.md#squirro.lib.nlp.steps.debuggers.Debugger) The field [`Debugger`](squirro.lib.nlp.steps.debuggers.Debugger.md#squirro.lib.nlp.steps.debuggers.Debugger) logs values of different fields of the [`Document`](../technical/libnlp/base.md#squirro.lib.nlp.document.Document) at different stages of the `Pipeline`. This is useful for debugging purposes. Parameters - `max_length` ([`int`](https://docs.python.org/3.11/library/functions.html#int)`, ``100`) – Maximum length of the logged value of a string type field. E.g (Can be used to limit the length of printed body) - `log_level` ([`str`](https://docs.python.org/3.11/library/stdtypes.html#str)`, ``"debug"`) – Debugging level one of [“debug”,”info”,”warning”] **Example** ```json { "step": "debugger", "type": "log_fields", "fields": ["body"], "log_level": "warning" } ``` 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) **`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))