# language_tool_python: a grammar checker for Python 📝

This is a Python wrapper for [LanguageTool](languagetool.org). LanguageTool is open-source grammar tool, also known as the spellchecker for OpenOffice. This library allows you to make to detect grammar errors and spelling mistakes through a Python script or through a command-line interface.

## Local and Remote Servers

By default, language_tool_python will download a LanguageTool server .jar and run that in the background to detect grammar errors locally. However, LanguageTool also offers a [Public HTTP Proofreading API](http://wiki.languagetool.org/public-http-api) that is supported as well. Follow the link for rate limiting details. (Running locally won’t have the same restrictions.)

### Using language_tool_python locally

Local server is the default setting. To use this, just initialize a LanguageTool object:

> import language_tool_python > tool = language_tool_python.LanguageTool(‘en-US’) # use a local server (automatically set up), language English

### Using language_tool_python with the public LanguageTool remote server

There is also a built-in class for querying LanguageTool’s public servers. Initialize it like this:

> import language_tool_python > tool = language_tool_python.LanguageToolPublicAPI(‘es’) # use the public API, language Spanish

### Using language_tool_python with the another remote server

Finally, you’re able to pass in your own remote server as an argument to the LanguageTool class:

> import language_tool_python > tool = language_tool_python.LanguageTool(‘ca-ES’, remote_server=’https://language-tool-api.mywebsite.net’) # use a remote server API, language Catalan

## Example usage

From the interpreter:

> import language_tool_python > tool = language_tool_python.LanguageTool(‘en-US’) > text = u’A sentence with a error in the Hitchhiker’s Guide tot he Galaxy’ > matches = tool.check(text) > len(matches) 2

Check out some Match object attributes:

> matches[0].ruleId, matches[0].replacements (‘EN_A_VS_AN’, [‘an’]) > matches[1].ruleId, matches[1].replacements (‘TOT_HE’, [‘to the’])

Print a Match object:

print(matches[1]) Line 1, column 51, Rule ID: TOT_HE[1] Message: Did you mean ‘to the’? Suggestion: to the …

Automatically apply suggestions to the text:

language_tool_python.correct(text, matches) ‘A sentence with an error in the Hitchhiker’s Guide to the Galaxy’

From the command line:

$ echo 'This are bad.' > example.txt

$ language_tool_python example.txt
example.txt:1:1: THIS_NNS[3]: Did you mean 'these'?

## Installation

To install via pip:

$ pip install --upgrade language_tool_python

To overwrite the host part of URL that is used to download LanguageTool-{version}.zip:

- SET language_tool_python_DOWNLOAD_HOST = [alternate URL]

## Prerequisites

The installation process should take care of downloading LanguageTool (it may take a few minutes). Otherwise, you can manually download LanguageTool-stable.zip and unzip it into where the language_tool_python package resides.

### LanguageTool Version

As of April 2020, language_tool_python was forked from language-check and no longer supports LanguageTool versions lower than 4.0.

### Acknowledgements This is a fork of https://github.com/myint/language-check/ (which is a fork of https://bitbucket.org/spirit/language_tool) that produces more easily parsable results from the command-line.

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Author: Jack Morris

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