CDO Local UUID Utility

This project provides a specialized UUID-generating function that can, on user request, cause a program to generate deterministic UUIDs. Its main purpose is to assist with generating version-controllable example data using consistent identifiers. This package intentionally includes mechanisms to make it difficult to activate this non-random mode without awareness of the caller.

Disclaimer

Participation by NIST in the creation of the documentation of mentioned software is not intended to imply a recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that any specific software is necessarily the best available for the purpose.

Installation

This repository can be installed from PyPI or from source.

Installing from PyPI

pip install cdo-local-uuid

Installing from source

Users who wish to install pre-release versions and/or make improvements to the code base should install in this manner.

1. Clone this repository.
2. (Optional) Create and activate a virtual environment.
3. Run pip install $x, where $x is the path to the cloned repository.

Local installation is demonstrated in the .venv.done.log target of the tests/ directory's Makefile.

Usage

This module provides a wrapper UUID generator, local_uuid(). It is intended to replace the Python call sequence str(uuid.uuid4()). In the default behavior, the two idioms behave the same:

>>> from uuid import uuid4
>>> from cdo_local_uuid import local_uuid
>>> str(uuid4())
'168ec24a-4920-43f5-85ad-9c6088b0cad8'
>>> local_uuid()
'bd203d75-f3eb-40fe-a266-b447beadbd54'

However, for some code-demonstration purposes, deterministic UUIDs might be desired, e.g. so a demonstration file including generated UUIDs can be regenerated and only change when the code changes, reducing version-control noise.

To see how to configure UUID generation, see the _demo_uuid function in this module.

Development status

This repository follows CASE community guidance on describing development status, by adherence to noted support requirements.

The status of this repository is:

4 - Beta

Versioning

This project follows SEMVER 2.0.0 where versions are declared.

Dependencies

This repository's primary module was originally part of the case-utils package. It was separated to provide a package with no runtime dependencies outside of the Python standard library.

Make targets

Some make targets are defined for this repository:

• check - Run unit tests.
• clean - Remove test build files, but not downloaded files.

Licensing

This repository is licensed under the Apache 2.0 License. See LICENSE.

Portions of this repository contributed by NIST are governed by the NIST Software Licensing Statement.