Quantities is designed to handle arithmetic and conversions
of physical quantities, which have a magnitude, dimensionality specified by
various units, and possibly an uncertainty. See the tutorial for examples.
Quantities builds on the popular numpy library and is designed to work with
numpy ufuncs, many of which are already supported. Quantities is actively
developed, and while the current features and API are stable, test coverage
is incomplete and so the package is not suggested for production use.