.. _fwflag_add_fleschkincaid:
======================
--add_fleschkincaid
======================
Switch
======

--add_fleschkincaid

Description
===========

Adds a Flesch-Kincaid grade-level readability score feature table, one score per group. Aliased as ``--add_fkscore``.

Argument and Default Value
==========================

No argument. Boolean switch, default: ``False``. Requires the ``textstat`` package (``pip install textstat``) — without it, DLATK prints ``Cannot import textstat (cannot use addFleschKincaidTable)`` and the feature values are never computed.

Details
=======

Verified table naming: creates ``feat$flkin$<corptable>$<correl_field>``.

**Known issue — broken in SQLite mode.** ``FeatureExtractor.addFleschKincaidTable()`` calls ``mm.disableTableKeys(...)`` directly (same pattern as :doc:`fwflag_add_char_ngrams`) before inserting rows. Verified: the destination table is created but stays empty, then the run fails with ``sqlite3.OperationalError: near "DISABLE": syntax error``. Works against MySQL (with ``textstat`` installed).

Other Switches
==============

Required Switches:

* :doc:`fwflag_d`, :doc:`fwflag_c`, :doc:`fwflag_t`

Example Commands
================

Requires MySQL and ``textstat`` — broken against SQLite, see Known issue above:

.. code-block:: bash

	dlatkInterface.py -d dla_tutorial -t msgs -c user_id --add_fleschkincaid