luhn

|pypi| |buildstatus| |coverage|

Generate and verify Luhn check digits

Install with

::

pip install luhn

Use verify to check digit strings

.. code:: python

>>> from luhn import *
>>> verify('356938035643809')
True
>>> verify('534618613411236')
False

and use generate to produce them

.. code:: python

>>> generate('53461861341123')
4

or append for convenience

.. code:: python

>>> append('53461861341123')
'534618613411234'

.. |pypi| image:: https://img.shields.io/pypi/v/luhn.svg?style=flat-square :target: https://pypi.python.org/pypi/luhn

.. |buildstatus| image:: https://img.shields.io/travis/mmcloughlin/luhn.svg?style=flat-square :target: https://travis-ci.org/mmcloughlin/luhn

.. |coverage| image:: https://img.shields.io/coveralls/mmcloughlin/luhn.svg?style=flat-square :target: https://coveralls.io/r/mmcloughlin/luhn