Pure-Python library for working with modular arithmetic, congruence classes, and finite fields.
The library allows users to work with congruence classes (including finite field elements) as objects, with support for many common operations.
This library is available as a package on PyPI:
The library can be imported in the usual way:
This library makes it possible to work with congruence classes (and sets of congruence classes such as finite fields) as objects. A congruence class is defined using a representative integer and a modulus:
Built-in operators can be used to perform modular addition, modular subtraction, and modular negation of congruence classes:
Modular multiplication, division, inversion, and exponentiation are also supported (when they are defined):
Individual congruence classes can be compared with one another according to their least nonnegative residues (and, thus, can also be sorted):
The membership operation is supported between integers and congruence classes:
A set of congruence classes such as a finite field can also be defined. The built-in length function len
_ and the membership operator are supported:
The built-in int
_ function can be used to retrieve the least nonnegative residue of a congruence class and the built-in len
_ function can be used to retrieve the modulus of a congruence class or set of congruence classes (this is the recommended approach):
Congruence classes and sets of congruence classes are also hashable (making it possible to use them as dictionary keys and as set members) and iterable:
The Chinese remainder theorem can be applied to construct the intersection of two congruence classes as a congruence class (when it is possible to do so):
Some familiar forms of notation for referring to congruence classes (and sets thereof) are also supported:
All installation and development dependencies are fully specified in pyproject.toml
. The project.optional-dependencies
object is used to specify optional requirements for various development tasks. This makes it possible to specify additional options (such as docs
, lint
, and so on) when performing installation using pip:
The documentation can be generated automatically from the source files using Sphinx:
All unit tests are executed and their coverage is measured when using pytest (see the pyproject.toml
file for configuration details):
Alternatively, all unit tests are included in the module itself and can be executed using doctest:
Style conventions are enforced using Pylint:
In order to contribute to the source code, open an issue or submit a pull request on the GitHub page for this library.
Beginning with version 0.2.0, 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.
This library can be published as a package on PyPI by a package maintainer. First, install the dependencies required for packaging and publishing:
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 that activates and sets as the default all tagged versions. Create and push a tag for this version (replacing ?.?.?
with the version number):
Remove any old build/distribution files. Then, package the source into a distribution archive:
Finally, upload the package distribution archive to PyPI: