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bitlist-1.1.0
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مشاهده بیشترتوضیحات
Pure-Python library for working with bit vectors.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | bitlist-1.1.0 |
| نام | bitlist |
| نسخه کتابخانه | 1.1.0 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Andrei Lapets |
| ایمیل نویسنده | a@lapets.io |
| آدرس صفحه اصلی | - |
| آدرس اینترنتی | https://pypi.org/project/bitlist/ |
| مجوز | MIT |
=======
bitlist
=======
Pure-Python library for working with bit vectors.
|pypi| |readthedocs| |actions| |coveralls|
.. |pypi| image:: https://badge.fury.io/py/bitlist.svg
:target: https://badge.fury.io/py/bitlist
:alt: PyPI version and link.
.. |readthedocs| image:: https://readthedocs.org/projects/bitlist/badge/?version=latest
:target: https://bitlist.readthedocs.io/en/latest/?badge=latest
:alt: Read the Docs documentation status.
.. |actions| image:: https://github.com/lapets/bitlist/workflows/lint-test-cover-docs/badge.svg
:target: https://github.com/lapets/bitlist/actions/workflows/lint-test-cover-docs.yml
:alt: GitHub Actions status.
.. |coveralls| image:: https://coveralls.io/repos/github/lapets/bitlist/badge.svg?branch=main
:target: https://coveralls.io/github/lapets/bitlist?branch=main
:alt: Coveralls test coverage summary.
Purpose
-------
This library allows programmers to work with bit vectors using a pure-Python data structure. Its design prioritizes interoperability with built-in Python classes and operators.
Installation and Usage
----------------------
This library is available as a `package on PyPI <https://pypi.org/project/bitlist>`__:
.. code-block:: bash
python -m pip install bitlist
The library can be imported in the usual way:
.. code-block:: python
import bitlist
from bitlist import bitlist
Examples
^^^^^^^^
.. |bitlist| replace:: ``bitlist``
.. _bitlist: https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist
This library makes it possible to construct bit vectors from a variety of representations (including integers, bytes-like objects, strings of binary digits, lists of binary digits, and other bit vectors). Integer arguments are converted into a big-endian binary representation:
.. code-block:: python
>>> bitlist(123)
bitlist('1111011')
>>> bitlist(bytes([255, 254]))
bitlist('1111111111111110')
>>> bitlist('101')
bitlist('101')
>>> bitlist([1, 0, 1, 1])
bitlist('1011')
>>> bitlist(bitlist('1010'))
bitlist('1010')
The optional ``length`` parameter can be used to specify the length of the created bit vector (padding consisting of zero bits is applied automatically *on the left-hand size*, if necessary):
.. code-block:: python
>>> bitlist(bytes([123]), length=16)
bitlist('0000000001111011')
>>> bitlist(16, 64)
bitlist('0000000000000000000000000000000000000000000000000000000000010000')
>>> bitlist(bitlist(123), 8)
bitlist('01111011')
If the ``length`` parameter has a value that is less than the minimum number of bits that would be included according to the default constructor behaviors, the bit vector is truncated *on the left-hand side* to match the specified length:
.. code-block:: python
>>> bitlist(bytes([123]), length=7)
bitlist('1111011')
>>> bitlist(bytes([123]), 4)
bitlist('1011')
>>> bitlist(bytes([123]), 2)
bitlist('11')
>>> bitlist(bytes([123]), 0)
bitlist()
Bit vectors are iterable sequences of individual bits (where each bit is represented as an integer). Both slice notation and retrieval of individual bits by index are supported. Furthermore, methods are available for converting a bit vector into other common representations:
.. code-block:: python
>>> b = bitlist('1111011')
>>> b[1:-1]
bitlist('11101')
>>> b[0]
1
>>> [bit for bit in b]
[1, 1, 1, 1, 0, 1, 1]
>>> b.bin()
'1111011'
>>> b.hex()
'7b'
>>> list(b.to_bytes())
[123]
`Concatenation <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__add__>`__, `partitioning <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__truediv__>`__, `subscription and slicing <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__getitem__>`__, `shift and rotation <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__lshift__>`__, `comparison <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__eq__>`__, and `logical <https://bitlist.readthedocs.io/en/1.1.0/_source/bitlist.html#bitlist.bitlist.bitlist.__and__>`__ operations are also supported by instances of the |bitlist|_ class. The larger example below -- a bitwise addition function -- illustrates the use of various operators supported by instances of the |bitlist|_ class:
.. code-block:: python
>>> def add(x, y):
... """Bitwise addition algorithm."""
... r = bitlist(0)
... carry = 0
... # Use negative indices for big-endian interface.
... for i in range(1, max(len(x), len(y)) + 1):
... r[-i] = (x[-i] ^ y[-i]) ^ carry
... carry = (x[-i] & y[-i]) | (x[-i] & carry) | (y[-i] & carry)
... r[-(max(len(x), len(y)) + 1)] = carry
... return r
...
>>> int(add(bitlist(123), bitlist(456)))
579
The `testing script <https://bitlist.readthedocs.io/en/1.1.0/_source/test_bitlist.html>`_ that accompanies this library contains additional examples of bitwise arithmetic operations implemented with the help of |bitlist|_ operators.
Development
-----------
All installation and development dependencies are fully specified in ``pyproject.toml``. The ``project.optional-dependencies`` object is used to `specify optional requirements <https://peps.python.org/pep-0621>`__ for various development tasks. This makes it possible to specify additional options (such as ``docs``, ``lint``, and so on) when performing installation using `pip <https://pypi.org/project/pip>`__:
.. code-block:: bash
python -m pip install .[docs,lint]
Documentation
^^^^^^^^^^^^^
The documentation can be generated automatically from the source files using `Sphinx <https://www.sphinx-doc.org>`__:
.. code-block:: bash
python -m pip install .[docs]
cd docs
sphinx-apidoc -f -E --templatedir=_templates -o _source .. && make html
Testing and Conventions
^^^^^^^^^^^^^^^^^^^^^^^
All unit tests are executed and their coverage is measured when using `pytest <https://docs.pytest.org>`__ (see the ``pyproject.toml`` file for configuration details):
.. code-block:: bash
python -m pip install .[test]
python -m pytest
The subset of the unit tests included in the module itself and the *documentation examples* that appear in the testing script can be executed separately using `doctest <https://docs.python.org/3/library/doctest.html>`_:
.. code-block:: bash
python src/bitlist/bitlist.py -v
python test/test_bitlist.py -v
Style conventions are enforced using `Pylint <https://pylint.readthedocs.io>`__:
.. code-block:: bash
python -m pip install .[lint]
python -m pylint src/bitlist test/test_bitlist.py
Contributions
^^^^^^^^^^^^^
In order to contribute to the source code, open an issue or submit a pull request on the `GitHub page <https://github.com/lapets/bitlist>`__ for this library.
Versioning
^^^^^^^^^^
Beginning with version 0.3.0, the version number format for this library and the changes to the library associated with version number increments conform with `Semantic Versioning 2.0.0 <https://semver.org/#semantic-versioning-200>`__.
Publishing
^^^^^^^^^^
This library can be published as a `package on PyPI <https://pypi.org/project/bitlist>`__ by a package maintainer. First, install the dependencies required for packaging and publishing:
.. code-block:: bash
python -m pip install .[publish]
Ensure that the correct version number appears in ``pyproject.toml``, and that any links in this README document to the Read the Docs documentation of this package (or its dependencies) have appropriate version numbers. Also ensure that the Read the Docs project for this library has an `automation rule <https://docs.readthedocs.io/en/stable/automation-rules.html>`__ that activates and sets as the default all tagged versions. Create and push a tag for this version (replacing ``?.?.?`` with the version number):
.. code-block:: bash
git tag ?.?.?
git push origin ?.?.?
Remove any old build/distribution files. Then, package the source into a distribution archive:
.. code-block:: bash
rm -rf build dist src/*.egg-info
python -m build --sdist --wheel .
Finally, upload the package distribution archive to `PyPI <https://pypi.org>`__:
.. code-block:: bash
python -m twine upload dist/*
نیازمندی
| مقدار | نام |
|---|---|
| ~=1.6 | parts |
| ~=3.3.1 | coveralls |
| ~=0.10.2 | toml |
| ~=4.2.0 | sphinx |
| ~=1.0.0 | sphinx-rtd-theme |
| ~=2.17.0 | pylint |
| ~=0.10 | build |
| ~=4.0 | twine |
| ~=7.2 | pytest |
| ~=4.0 | pytest-cov |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7 | Python |
نحوه نصب
نصب پکیج whl bitlist-1.1.0:
pip install bitlist-1.1.0.whl
نصب پکیج tar.gz bitlist-1.1.0:
pip install bitlist-1.1.0.tar.gz