diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..e51bdc2 --- /dev/null +++ b/.gitignore @@ -0,0 +1,232 @@ +### Linux ### +*~ + +# temporary files which can be created if a process still has a handle open of a deleted file +.fuse_hidden* + +# KDE directory preferences +.directory + +# Linux trash folder which might appear on any partition or disk +.Trash-* + +# .nfs files are created when an open file is removed but is still being accessed +.nfs* + +### Python ### +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +share/python-wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.nox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*.cover +*.py,cover +.hypothesis/ +.pytest_cache/ +cover/ + +# Translations +*.mo +*.pot + +# Django stuff: +*.log +local_settings.py +db.sqlite3 +db.sqlite3-journal + +# Flask stuff: +instance/ +.webassets-cache + +# Scrapy stuff: +.scrapy + +# Sphinx documentation +docs/_build/ + +# PyBuilder +.pybuilder/ +target/ + +# Jupyter Notebook +.ipynb_checkpoints + +# IPython +profile_default/ +ipython_config.py + +# pyenv +# For a library or package, you might want to ignore these files since the code is +# intended to run in multiple environments; otherwise, check them in: +# .python-version + +# pipenv +# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. +# However, in case of collaboration, if having platform-specific dependencies or dependencies +# having no cross-platform support, pipenv may install dependencies that don't work, or not +# install all needed dependencies. +#Pipfile.lock + +# poetry +# Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control. +# This is especially recommended for binary packages to ensure reproducibility, and is more +# commonly ignored for libraries. +# https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control +#poetry.lock + +# pdm +# Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control. +#pdm.lock +# pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it +# in version control. +# https://pdm.fming.dev/#use-with-ide +.pdm.toml + +# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm +__pypackages__/ + +# Celery stuff +celerybeat-schedule +celerybeat.pid + +# SageMath parsed files +*.sage.py + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ + +# Spyder project settings +.spyderproject +.spyproject + +# Rope project settings +.ropeproject + +# mkdocs documentation +/site + +# mypy +.mypy_cache/ +.dmypy.json +dmypy.json + +# Pyre type checker +.pyre/ + +# pytype static type analyzer +.pytype/ + +# Cython debug symbols +cython_debug/ + +# PyCharm +# JetBrains specific template is maintained in a separate JetBrains.gitignore that can +# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore +# and can be added to the global gitignore or merged into this file. For a more nuclear +# option (not recommended) you can uncomment the following to ignore the entire idea folder. +#.idea/ + +### Python Patch ### +# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration +poetry.toml + +# ruff +.ruff_cache/ + +# LSP config files +pyrightconfig.json + +### VisualStudioCode ### +.vscode/* +!.vscode/settings.json +!.vscode/tasks.json +!.vscode/launch.json +!.vscode/extensions.json +!.vscode/*.code-snippets + +# Local History for Visual Studio Code +.history/ + +# Built Visual Studio Code Extensions +*.vsix + +### VisualStudioCode Patch ### +# Ignore all local history of files +.history +.ionide + +### Windows ### +# Windows thumbnail cache files +Thumbs.db +Thumbs.db:encryptable +ehthumbs.db +ehthumbs_vista.db + +# Dump file +*.stackdump + +# Folder config file +[Dd]esktop.ini + +# Recycle Bin used on file shares +$RECYCLE.BIN/ + +# Windows Installer files +*.cab +*.msi +*.msix +*.msm +*.msp + +# Windows shortcuts +*.lnk + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d1f261d --- /dev/null +++ b/LICENSE @@ -0,0 +1,22 @@ +MIT License + +Copyright (c) 2025 Snaffys + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/python-version b/python-version new file mode 100644 index 0000000..db81c67 --- /dev/null +++ b/python-version @@ -0,0 +1,2 @@ +Python 3.13.7 + diff --git a/src/fast_pow.py b/src/fast_pow.py index 1ba1dc1..22549fc 100644 --- a/src/fast_pow.py +++ b/src/fast_pow.py @@ -1,6 +1,31 @@ -def fastPow(number, power): - result = number - while power != 1: - result *= result - power = power // 2 +def fast_pow(number, power): + if (not isinstance(number, int)) and (not isinstance(number, float)): + print("Error: number is not an integer!") + return None + if not isinstance(power, int): + print("Error: power is not an integer!") + return None + if power < 0: + print("Error: negative value!") + return None + + if number == 0 and power == 0: + print("Error: 0 to the power of 0 is undefined!") + return None + + if power == 0: + return 1 + if power == 1: + return number + + result = 1 + base = number + + while power > 0: + if power % 2 == 1: + result *= base + base *= base + power //= 2 + return result + diff --git a/src/luhn.py b/src/luhn.py index 11d993c..3b33b00 100644 --- a/src/luhn.py +++ b/src/luhn.py @@ -1,14 +1,54 @@ -def luhnСheck(cardNumber): - digits = [int(d) for d in str(cardNumber) if d.isdigit()] +def luhn_check(card_number): + card_number_str = str(card_number).replace(" ", "") + + if not card_number_str.isdigit(): + print("Error: must contain only digits!") + return None + + if len(card_number_str) < 16: + print("Error: must contain at least 16 digits!") + return None + + digits = [int(d) for d in card_number_str] control = digits.pop() - parity = (len(digits))%2 + + parity = (len(digits) + 1) % 2 total = 0 for i in range(len(digits)): + doubled = digits[i] + if i % 2 == parity: - doubled = digits[i] * 2 + doubled = doubled * 2 if doubled > 9: - doubled -= 9 - total += doubled - else: - total += digits[i] + doubled = doubled - 9 + total += doubled + return (total + control) % 10 == 0 + + +def main(): + print("Enter card number to check validity") + print("Enter '-1' to exit") + + while True: + user_input = input("\nEnter card number: ").strip() + + if user_input == "-1": + break + + if not user_input: + print("Empty input!") + continue + + result = luhn_check(user_input) + + if result is None: + continue + elif result: + print("correct") + else: + print("incorrect") + +if __name__ == "__main__": + main() + \ No newline at end of file diff --git a/test/test_fast_pow.py b/test/test_fast_pow.py index 5e4aebd..36dcff1 100644 --- a/test/test_fast_pow.py +++ b/test/test_fast_pow.py @@ -1,9 +1,41 @@ -from src.fast_pow import fastPow +from src.fast_pow import fast_pow def test_two_power_two(): - assert fastPow(2, 2) == 4 + assert fast_pow(2, 2) == 4 -def test_negative(): - assert fastPow(-1, 4) == 1 +def test_negative_base(): + assert fast_pow(-1, 4) == 1 + +def test_negative_power_returns_none(): + assert fast_pow(2, -1) is None + + +def test_zero_power_returns_one(): + assert fast_pow(5, 0) == 1 + assert fast_pow(100, 0) == 1 + assert fast_pow(-3, 0) == 1 + + +def test_power_of_one_returns_same_number(): + assert fast_pow(5, 1) == 5 + assert fast_pow(-3, 1) == -3 + + +def test_zero_base_cases(): + assert fast_pow(0, 1) == 0 + assert fast_pow(0, 5) == 0 + + +def test_float_base(): + assert fast_pow(2.5, 2) == 6.25 + + +def test_non_integer_power_returns_none(): + assert fast_pow(2, 2.5) is None + + +def test_zero_to_zero_returns_none(): + assert fast_pow(0, 0) is None + diff --git a/test/test_luhn.py b/test/test_luhn.py index 1c021a2..f371359 100644 --- a/test/test_luhn.py +++ b/test/test_luhn.py @@ -1,9 +1,26 @@ -from src.luhn import luhnСheck +from src.luhn import luhn_check -def test_good(): - assert luhnСheck("8571 2612 1234 5467") +def test_luhn_valid_card(): + assert luhn_check(4532015112830366) == True + assert luhn_check(6011514433546201) == True + assert luhn_check("4532 0151 1283 0366") == True -def test_bad(): - assert not luhnСheck("4561 2612 1234 5463") \ No newline at end of file +def test_luhn_invalid_card(): + assert luhn_check(4532015112830367) == False + assert luhn_check(1234567812345678) == False + + +def test_luhn_short_number(): + assert luhn_check(123456789345) == None + + +def test_luhn_non_digits(): + assert luhn_check("4532-0151-1283-0366") == None + assert luhn_check("4532abcd12830366") == None + + +def test_luhn_empty_string(): + assert luhn_check("") == None +