Luhn-algorithm. Generate and validate strings of numbers. It is used for account number validation, credit card validation, data verification, cryptography, decoding, etcetera. Rust realization for speed-up python code. Thread-safe. See benchmark for details.
Author: | Matt Stroganov |
---|---|
Version: | 0.1.5 |
Install with pip:
$ pip install fast-luhn
Import package:
>>> import fast_luhn as fl
Check if string is valid by luhn algorithm. Return bool.
>>> fl.validate("471629309440")
False
Calculate next digit for string of numbers. Return int.
>>> fl.digit("47162930944")
7
Add luhn-check digit to string of numbers. Return string.
>>> fl.complete("2398560146")
'23985601469'
Generate luhn-valid string of numbers with length. Return string.
>>> fl.generate(50)
'58126333877729238938910323395262199130041545367401'
Install from sources:
$ git clone https://github.com/cybermatt/fast-luhn $ cd fast-luhn $ pip install -r requirements-dev.txt $ python ./setup.py develop
Pure python realization (from here) was very slow.
Comparison with popular python Luhn modules:
method lib | luhn | LAP | fast-luhn |
---|---|---|---|
validate | 4.65 µs | 13.3 µs | 0.2 µs |
generate | 48.1 µs | 94.4 µs | 3.17 µs |
Environment:
- CPU i5-6500 3.20GHz, 16gb RAM
- Linux 4.19
- Python 3.7.3
$ pytest -v tests.py
This project is licensed under the MIT License - see the LICENSE.txt file for details