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Modules to convert numbers to words. Easily extensible.

Project description

num2words - Convert numbers to words in multiple languages

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num2words is a library that converts numbers like 42 to words like forty-two. It supports multiple languages (see the list below for full list of languages) and can even generate ordinal numbers like forty-second (although this last feature is a bit buggy for some languages at the moment).

The project is hosted on GitHub. Contributions are welcome.

Installation

The easiest way to install num2words is to use pip:

pip install num2words

Otherwise, you can download the source package and then execute:

python setup.py install

The test suite in this library is new, so it’s rather thin, but it can be run with:

python setup.py test

To run the full CI test suite which includes linting and multiple python environments:

pip install tox
tox

Usage

Command line:

$ num2words 10001
ten thousand and one
$ num2words 10123123 --lang es
diez millones ciento veintitrés mil ciento veintitrés
$ num2words 24,120.10
twenty-four thousand, one hundred and twenty point one
$ num2words 24,120.10 -l es
veinticuatro mil ciento veinte punto uno
$num2words 2.14 -l es --to currency
dos euros con catorce centimos

In code there’s only one function to use:

>>> from num2words import num2words
>>> num2words(42)
forty-two
>>> num2words(42, to='ordinal')
forty-second
>>> num2words(42, lang='fr')
quarante-deux

Besides the numerical argument, there are two main optional arguments.

to: The converter to use. Supported values are:

  • cardinal (default)
  • ordinal
  • ordinal_num
  • year
  • currency

lang: The language in which to convert the number. Supported values are:

  • en (English, default)
  • ar (Arabic)
  • cz (Czech)
  • de (German)
  • dk (Danish)
  • en_GB (English - Great Britain)
  • en_IN (English - India)
  • es (Spanish)
  • es_CO (Spanish - Colombia)
  • es_VE (Spanish - Venezuela)
  • eu (EURO)
  • fi (Finnish)
  • fr (French)
  • fr_CH (French - Switzerland)
  • fr_BE (French - Belgium)
  • fr_DZ (French - Algeria)
  • he (Hebrew)
  • id (Indonesian)
  • it (Italian)
  • ja (Japanese)
  • ko (Korean)
  • lt (Lithuanian)
  • lv (Latvian)
  • no (Norwegian)
  • pl (Polish)
  • pt (Portuguese)
  • pt_BR (Portuguese - Brazilian)
  • sl (Slovene)
  • sr (Serbian)
  • ro (Romanian)
  • ru (Russian)
  • sl (Slovene)
  • tr (Turkish)
  • th (Thai)
  • vi (Vietnamese)
  • nl (Dutch)
  • uk (Ukrainian)

You can supply values like fr_FR; if the country doesn’t exist but the language does, the code will fall back to the base language (i.e. fr). If you supply an unsupported language, NotImplementedError is raised. Therefore, if you want to call num2words with a fallback, you can do:

try:
    return num2words(42, lang=mylang)
except NotImplementedError:
    return num2words(42, lang='en')

Additionally, some converters and languages support other optional arguments that are needed to make the converter useful in practice.

Wiki

For additional information on some localization please check the Wiki. And feel free to propose wiki enhancement.

History

num2words is based on an old library, pynum2word, created by Taro Ogawa in 2003. Unfortunately, the library stopped being maintained and the author can’t be reached. There was another developer, Marius Grigaitis, who in 2011 added Lithuanian support, but didn’t take over maintenance of the project.

I am thus basing myself on Marius Grigaitis’ improvements and re-publishing pynum2word as num2words.

Virgil Dupras, Savoir-faire Linux

Changelog

Version 0.5.8 – 2018/11/17

  • Add Portuguese (Portugal) localization (#198)
  • Add a command line tool to use num2words
  • Use language iso code for Vietnamese
  • Improve Korean localization (#219)
  • Improve Serbian (Latin) localization (#207)
  • Improve testing setup (#220)
  • Improve German localization (#214) (#222)
  • Improve Romanian localization (#215)
  • Improve Spanish localization (#187) (#200)
  • Improve Russian localization (#211) (#212)
  • Improve French localization (23902ab)
  • Improve Arabic localization (#176)
  • Improve Lithuanian and Latvian localization (#185)
  • Improve Ukrainian localization (#183)

Version 0.5.7 – 2018/06/27

  • Add Finnish localization. (#170)
  • Add Japanese localization. (#171)
  • Add belgian-french localization. (#151)
  • Add Czech localization. (#154)
  • Add Thai localization. (#139)
  • Improve English localization. (#144)
  • Improve Spanish localization. (#167)
  • Improve Italian localization. (#143)
  • Improve documentation. (#155, #145, #174)

Version 0.5.6 – 2017/11/22

  • Refactor to_currency (#135)
  • Allow the use of other convertes to_currency, to_year (#95)
  • Fix code to respect PEP8 (#98, #105)
  • Add Slovene localization (#97)
  • Add Ukrainian localization (#93)
  • Add Dutch localization (#91)
  • Add Algeria-French localization (#86)
  • Add Turkish localization (#85)

Version 0.5.5 – 2017/07/02

  • Add Arabic localization (#72)
  • Add Spanish-Colombian and Spanish-Venezuelan localization (#67)
  • Add VietNam localization (#61)
  • Add Italian localization (#56, #59)
  • Improve Russian localization (#62)
  • Improve Polish localization (#58)

Version 0.5.4 – 2016/10/18

  • Tons of new languages!
  • Add Polish localization. (#23)
  • Add Swiss-French localization. (#38)
  • Add Russian localization. (#28, #46, #48)
  • Add Indonesian localization. (#29)
  • Add Norwegian localization. (#33)
  • Add Danish localization. (#40)
  • Add Brazilian localization. (#37, #47)
  • Improve German localization. (#25, #27, #49)
  • Improve Lithuanian localization. (#52)
  • Improve floating point spelling. (#24)

Version 0.5.3 – 2015/06/09

  • Fix packaging issues. (#21, #22)

Version 0.5.2 – 2015/01/23

  • Added Latvian localization. (#9)
  • Improved Spanish localization. (#10, #13, #14)
  • Improved Lithuanian localization. (#12)

Version 0.5.1 – 2014/03/14

  • Added Python 3 support with 2to3. (#3)
  • Fixed big numbers in spanish. (#2)
  • Fixed bugs in tanslation from 30 to 40 in spanish. (#4)
  • Fixed word joining in english. (#8)

Version 0.5.0 – 2013/05/28

  • Created num2words based on the old pynum2word project.

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