.. image:: https://github.com/zopefoundation/roman/actions/workflows/tests.yml/badge.svg
:target: https://github.com/zopefoundation/roman/actions/workflows/tests.yml
.. image:: https://coveralls.io/repos/github/zopefoundation/roman/badge.svg?branch=master
:target: https://coveralls.io/github/zopefoundation/roman?branch=master
.. image:: https://img.shields.io/pypi/v/roman.svg
:target: https://pypi.org/project/roman/
:alt: Current version on PyPI
.. image:: https://img.shields.io/pypi/pyversions/roman.svg
:target: https://pypi.org/project/roman/
:alt: Supported Python versions
roman
=====
Small helper library to convert arabic to roman numerals.
There are two ways to use this library.
1. Importing it into your application
.. code-block:: python
import roman
# to roman
number = int(input('> ')) # 10
print(roman.toRoman(number))
# from roman
number = input('> ') # X
print(roman.fromRoman(number))
2. ``roman`` CLI command
.. code-block:: bash
~$ roman 972
CMLXXII
# use the -r/--reverse to convert Roman numerals
~$ roman -r CMLXXII
972
# case insensitive
~$ roman -r cMlxxii
972
Change log
==========
5.1 (2025-07-18)
----------------
- Hide undocumented special behavior for ``N`` behind method parameter.
(`#30 <https://github.com/zopefoundation/roman/issues/30>`_)
5.0 (2025-01-15)
----------------
- Drop support for Python 3.7, 3.8.
- Add support for lower case roman numerals.
(`#22 <https://github.com/zopefoundation/roman/pull/22>`_)
4.2 (2024-04-25)
----------------
- Remove overlooked mentions of the Python 2.1.1 license
(`#17 <https://github.com/zopefoundation/roman/issues/17>`_)
- Add support for Python 3.12 and 3.13.
4.1 (2023-05-26)
----------------
- Change license to the Zope Public License (ZPL) version 2.1
(`#15 <https://github.com/zopefoundation/roman/issues/15>`_)
4.0 (2023-02-28)
----------------
- Add support for Python 3.10, 3.11.
- Drop support for Python 2.7, 3.5, 3.6.
3.3 (2020-07-12)
----------------
- added support for Python 3.9
- added CLI command ``roman`` with ``-r/--reverse`` to convert back from Roman
- added simple usage instructions
3.2 (2019-04-14)
----------------
- expanded test coverage
- Added support for 0 -> N
(see https://en.wikipedia.org/wiki/Roman_numerals#Zero)
- Added support for Python 3.8
3.1 (2018-10-24)
----------------
- Added support for Python 3.7.
3.0 (2018-05-28)
----------------
- Added support for Python 3.5, 3.6 and PyPy3.
- Dropped support for Python 2.6 and 3.3.
2.0.0 (2013-02-25)
------------------
- Added Python 3.3 and PyPy support.
- Added tests.
1.4.0 (2009-07-23)
------------------
- Initial PyPI release.
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