==============
pyLanguagetool
==============
|license| |latestrelease| |pypi_versions|

A python library and CLI for the LanguageTool_ `JSON API`_.

LanguageTool_ is an open source spellchecking platform. It supports a large
variety of languages and has advanced grammar support.

.. image:: https://pylanguagetool.lw1.at/_images/screenshot.png

.. start-of-homepage-text

Installation
------------
pyLanguagetool can be installed with pip/pipenv:

.. code:: bash

    pip install pylanguagetool
    # or via pipenv
    pipenv install pylanguagetool

Basic Usage
-----------
.. code:: bash

    # pipe text to pylanguagetool
    echo "This is a example" | pylanguagetool

    # read text from a file
    pylanguagetool textfile.txt

    # read text from stdin
    pylanguagetool < textfile.txt

    # read text from the systems clipboard
    pylanguagetool -c # get text from system clipboard

All samples above will return a list of detected errors and possible
replacements.

.. code::

    # Use "an" instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
    #   ✗ This is a example
    #             ^
    #   ✓ This is an example



Configuration
-------------
All `LanguageTool API`_ parameters can be set via command line arguments,
environment variables or a configuration file
(``~/.config/pyLanguagetool.conf``) For more information about the
configuration file syntax, read the `ConfigArgParse documentation`_.

Privacy
-------

By default, pyLanguagetool sends all text via HTTPS to the `LanguageTool`_
server (see their `privacy policy`_). You can also `set up your own server`_ and
use it by changing the ``--api-url`` attribute.

Parameters
----------

.. code::

    $ pylanguagetool --help
    usage: pylanguagetool [-h] [-V] [-v] [-a API_URL] [--no-color] [-c] [-s]
                          [-t {txt,html,md,markdown,rst,ipynb,json,xliff}] [-u]
                          [-r] [--rule-categories] [-l LANG] [-m MOTHER_TONGUE]
                          [-p PREFERRED_VARIANTS] [-e ENABLED_RULES]
                          [-d DISABLED_RULES]
                          [--enabled-categories ENABLED_CATEGORIES]
                          [--disabled-categories DISABLED_CATEGORIES]
                          [--enabled-only] [--picky] [-U USERNAME] [-P API_KEY]
                          [--pwl PWL]
                          [input files ...]

    positional arguments:
      input files           input file(s)

    options:
      -h, --help            show this help message and exit
      -V, --version         print version and exit
      -v, --verbose         verbose output [env var: VERBOSE]
      -a, --api-url API_URL
                            the URL of the v2 languagetool API, should end with
                            '/v2/' [env var: API_URL]
      --no-color            don't color output [env var: NO_COLOR]
      -c, --clipboard       get text from system clipboard [env var: CLIPBOARD]
      -s, --single-line     check every line on its own [env var: SINGLE_LINE]
      -t, --input-type {txt,html,md,markdown,rst,ipynb,json,xliff}
                            if not plaintext [env var: INPUT_TYPE]
      -u, --explain-rule    print URLs with more information about rules [env var:
                            EXPLAIN_RULE]
      -r, --rules           show the matching rules [env var: RULES]
      --rule-categories     show the the categories of the matching rules [env
                            var: RULE_CATEGORIES]
      -l, --lang LANG       A language code like en or en-US, or auto to guess the
                            language automatically (see preferredVariants below).
                            For languages with variants (English, German,
                            Portuguese) spell checking will only be activated when
                            you specify the variant, e.g. en-GB instead of just
                            en. [env var: TEXTLANG]
      -m, --mother-tongue MOTHER_TONGUE
                            A language code of the user's native language,
                            enabling false friends checks for some language pairs.
                            [env var: MOTHER__TONGUE]
      -p, --preferred-variants PREFERRED_VARIANTS
                            Comma-separated list of preferred language variants.
                            The language detector used with language=auto can
                            detect e.g. English, but it cannot decide whether
                            British English or American English is used. Thus this
                            parameter can be used to specify the preferred
                            variants like en-GB and de-AT. Only available with
                            language=auto. [env var: PREFERRED_VARIANTS]
      -e, --enabled-rules ENABLED_RULES
                            IDs of rules to be enabled, comma-separated [env var:
                            ENABLED_RULES]
      -d, --disabled-rules DISABLED_RULES
                            IDs of rules to be disabled, comma-separated [env var:
                            DISABLED_RULES]
      --enabled-categories ENABLED_CATEGORIES
                            IDs of categories to be enabled, comma-separated [env
                            var: ENABLED_CATEGORIES]
      --disabled-categories DISABLED_CATEGORIES
                            IDs of categories to be disabled, comma-separated [env
                            var: DISABLED_CATEGORIES]
      --enabled-only        enable only the rules and categories whose IDs are
                            specified with --enabled-rules or --enabled-categories
      --picky               if enabled, additional rules will be activated
      -U, --username USERNAME
                            For languagetool.org Premium API. Your username/email
                            as used to log in at languagetool.org [env var:
                            USERNAME]
      -P, --api-key API_KEY
                        For languagetool.org Premium API. [env var: API_KEY]
      --pwl, --personal-word-list PWL
                            File name of personal dictionary. A private dictionary
                            can be used to add special words that would otherwise
                            be marked as spelling errors. [env var:
                            PERSONAL_WORD_LIST]

    Args that start with '--' can also be set in a config file
    (~/.config/pyLanguagetool.conf). Config file syntax allows: key=value,
    flag=true, stuff=[a,b,c] (for details, see syntax at
    https://pypi.org/project/ConfigArgParse/). In general, command-line values
    override environment variables which override config file values which
    override defaults.

.. |license| image:: https://img.shields.io/badge/license-MIT-blue.svg
    :target: https://raw.githubusercontent.com/Findus23/pyLanguagetool/master/LICENSE
.. |latestrelease| image:: https://img.shields.io/pypi/v/pyLanguagetool.svg
    :target: https://pypi.python.org/pypi/pyLanguagetool
    :alt: Latest Version
.. |pypi_versions| image:: https://img.shields.io/pypi/pyversions/pylanguagetool.svg
    :target: https://pypi.python.org/pypi/pyLanguagetool

.. _LanguageTool: https://languagetool.org/

.. _JSON API: https://languagetool.org/http-api/swagger-ui/#/default

.. _LanguageTool API: https://languagetool.org/http-api/swagger-ui/#/default

.. _ConfigArgParse documentation: https://github.com/bw2/ConfigArgParse#config-file-syntax

.. _privacy policy: https://languagetool.org/privacy/

.. _set up your own server: https://dev.languagetool.org/http-server