Introduction

“”ஓர் ஆயிரம் கழித்தல் ஐந்து பெருக்கல் (ஒன்பது கூட்டல் ஒன்று)” என்பதை எப்படி 950 என்று கணினி புரிந்து கொள்ளும் ? Open-Tamil வழியாகத்தான் – வாங்க இதை பார்க்கலாம்.

Open-Tamil is a free and open-source Tamil Text / Natural Language Processing library (NLP) written in Python, and developed since early 2010s. This blog post is cover our gaps in marketing (on our part, ofcourse) Open-Tamil regarding the capabilities and features presented by Open-Tamil python library. Open-Tamil Python package is distributed under MIT license.

Documentation

Open-Tamil project is currently in the release v0.96 – the Python package can be found here. Documentation from Sphinx for Open-Tamil package can be found on Tamilpesu.us site at this URL.

Installation

Open-Tamil can be installed by running the following command from your terminal with root privileges on Python3. You cannot use current/later versions of Open-Tamil with v2.x – please refer to older releases on pypi page which are still available to you.

$ pip install –upgrade open-tamil>=0.96

If you want to install locally, you can run this command instead,

$ pip install –upgrade open-tamil>=0.96 –user

Python Modules

Open-Tamil provides the following Python modules with various classess and functionalities. You can learn more about them from browsing our documentation.

In summary we can list them as follows,

	Module		Functionality
1	tamil Tamil tokenization, word ordering, encoding converters, numerals, text summarizer		Subpackages tamil.txt2ipa package Submodules tamil.txt2ipa.ipaconvert module tamil.txt2ipa.transliteration module tamil.txt2ipa.unicode2ipa module Module contents tamil.txt2unicode package Submodules tamil.txt2unicode.encode2unicode module tamil.txt2unicode.encode2utf8 module tamil.txt2unicode.orddic module tamil.txt2unicode.unicode2encode module Module contents tamil.utils package Submodules tamil.utils.TextSummaryExtractor module tamil.utils.santhirules module Module contents Submodules tamil.date module tamil.iscii module tamil.numeral module tamil.regexp module tamil.tscii module tamil.tscii2utf8 module tamil.tweetparser module tamil.utf8 module tamil.wordutils module Module contents
2	ngram corpus modeling classes		ngram.Corpus module ngram.Distance module ngram.LetterModels module ngram.WordModels module
3	solthiruthi Tamil spelling checker algorithms		solthiruthi package Submodules solthiruthi.Ezhimai module solthiruthi.WordSpeller module solthiruthi.data_parser module solthiruthi.datastore module solthiruthi.dictionary module solthiruthi.dom module solthiruthi.heuristics module solthiruthi.morphology module solthiruthi.resources module solthiruthi.scoring module solthiruthi.solthiruthi module solthiruthi.suggestions module solthiruthi.vinaisorkal module Module contents
4	spell Tamil spelling checker application		spell package
5	tamilmorse Morse code utilities for Tamil; இந்த தொகுப்பில் தமிழுக்கான மோர்சு குறிகளை உருவாக்கவும், குறியீடுகளை பிரித்துப்பார்கவும் முடியும்.		tamilmorse package Submodules tamilmorse.morse_encode module tamilmorse.morse_decode module
6	tamilsandhi Tamil sandhi rules checker		tamilsandhi package தமிழில் சந்திப்பிழை திருத்தி உருவாக்கவும் பிழைக திருத்தவும் உதவியாகஇந்த நிரல் தொகுப்பு வழிவகுக்கும். ஏரக்குறைய 40-விதிகளை கொண்டது இந்த நிரல் தொகுப்பை உருவாக்கியவர் திருமதி. நித்யா. மேலும் விவரங்களுக்க https://github.com/nithyadurai87/tamil-sandhi-checker
7	transliterate Transliteration tables for Jaffna, University of Madras, Bamini schemes; both forward/backward transliteration algorithms		transliterate package Submodules transliterate.UOM module transliterate.algorithm module transliterate.azhagi module transliterate.combinational module transliterate.jaffna module Module contents
8	tamilstemmer This module is new in version 0.96 and provides access to simple stemmer functions originally created by Damodharan Rajalingam.		Tamil Stemmer source code
9	examples Various examples and utilities in Open-Tamil package; nifty code tips and tricks		Open-Tamil source code examples like numeral to audio generation, ngram generation, corpus analysis etc. see link here.

Calculator Example

One fun use of the API is to build interactive websites like tamilpesu.us but a more interesting use is to build a text based calculator taking inputs in form of Tamil numerals with Tamil words for arithmetic operations like add, subtract, multiply and divide.

“”ஓர் ஆயிரம் கழித்தல் ஐந்து பெருக்கல் (ஒன்பது கூட்டல் ஒன்று)” என்பதை எப்படி 950 என்று கணினி புரிந்து கொள்ளும் ?

Using Open-Tamil we can parse the numerals back to numbers and form a simple mathematical infix expression;

1000 – 5 * ( 9 + 1 )

then use Python eval() we can use Python parser and evaluator to build the expression tree and compute the post-order traversal and execute the expression to receive the result, which in our case is not surprisingly,

950.

Well, all this can be done in less than 30 lines of code using Open-Tamil; if you don’t believe me check-out the code here.

Credits

A large number of individuals have contributed their time and effort over the years in many capacities to the project; should you wish to acknowledge this project in your research, products you can choose to cite any of our published works of relevance to you; our publications are listed here.

As always if you wish to report bugs, or share your comments please write an email to me ezhillang AT gmail DOT com or file an issue at github.