barril 1.9.0

Python package to manage units for physical quantities

What is Barril?

Python package to manage units for physical quantities.

Quick example:

from barril.units import Scalar

s1 = Scalar(10, 'm')
s2 = Scalar(500, 'cm')
assert s1 + s2 == Scalar(15, 'm')

Features

• Pre-defined unit database containing several physical quantities for the Oil & Gas industry.

• Data types with an associated unit: Scalar, Array, Quantity, FixedArray.

• Automatic conversion during arithmetic operations.

Development

For complete description of what type of contributions are possible, see the full CONTRIBUTING guide.

Here is a quick summary of the steps necessary to setup your environment to contribute to barril.

1. Create a virtual environment and activate it:

   $ python -m virtualenv .env
   $ .env\Scripts\activate  # windows
   $ source .env/bin/activate  # linux

   Note

   If you use conda, you can install virtualenv in the root environment:

   $ conda install -n root virtualenv

   Don’t worry as this is safe to do.

2. Update pip:

   $ python -m pip install -U pip

3. Install development dependencies:

   $ pip install -e .[testing]

4. Install pre-commit:

   $ pre-commit install

5. Run tests:

   $ pytest --pyargs barril

6. Generate docs locally:

   $ tox -e docs

   The documentation files will be generated in docs/_build.

Release

A reminder for the maintainers on how to make a new release.

Note that the VERSION should folow the semantic versioning as X.Y.Z Ex.: v1.0.5

1. Create a release-VERSION branch from upstream/master.

2. Update CHANGELOG.rst.

3. Push a branch with the changes.

4. Once all builds pass, push a VERSION tag to upstream.

5. Merge the PR.

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

1.9.0 (2020-02-20)

• New classmethod Array.FromScalars that creates an Array from a List[Scalar].

• Add new unit: “barrel per second” (bbl/s).

1.8.0 (2020-01-10)

• Add new category: “standard volume per standard volume”

• Move unit sm3/sm3 from “volume per volume” to “standard volume per standard volume”

1.7.2 (2019-10-16)

• _foundation has been renamed to _util, and a lot of functions which were not being used anymore have been removed.

• Add new unit category mass temperature per mol (kg.K/mol).

• Some units have been renamed as they were deemed out-of-place in the oil industry to something more usual (for example, 1000ft3/d became Mcf/d). The old representation of those units is still supported, but they will be automatically translated during Quantity creation, so this change should not affect users much.

• Fix division 1.0 / a where a is a Scalar or Array and also add support for floor division, i.e., operations like a // b where a and b are Scalar or Array (and combinations with float or int).

• Add new unit category for Joule-Thomson coefficient (K/Pa).

• Add new temperature unit for density derivative in respect to temperature (kg/m3.K).

1.7.1 (2019-10-03)

• Fixed bug in / and - operators for FixedArray.

1.7.0 (2019-06-18)

• Add unit system.

1.6.1 (2019-04-11)

• Change export to include ICurve and Curve and exclude IReadOnlyScalar.

1.6.0 (2019-04-10)

• Add curve implementation.

• Add support to interfaces from oop-ext.

• Drop support to Python 2.

1.5.0 (2019-01-09)

• Quantity.CheckValue now raises QuantityValidationError instead of ValueError.

1.4.0 (2018-12-17)

• Add new category for “concentration ratio”.

1.3.0 (2018-10-13)

• Add “per micrometre” unit to “per length” category.

• Remove internal barril.fixtures module as it is not necessary or part of the public API.

1.2.0 (2018-09-26)

• Add units for defining Spring-Dashpot movements.

1.1.0 (2018-09-24)

• Add number and fraction properties to FractionValue.

• Add unit read-only property to Quantity.

1.0.0 (2018-09-21)

• First feature release.

0.1.0 (2018-09-03)

• First release on PyPI.