# History¶

unyt began life as a submodule of yt named yt.units.

It was separated from yt.units as its own package in 2018.

## 1.0.7 (2018-08-13)¶

Trigger zenodo archiving.

## 1.0.6 (2018-08-13)¶

Minor paper updates to finalize JOSS submission.

## 1.0.5 (2018-08-03)¶

unyt 1.0.5 includes changes that reflect the peew review process for the JOSS method paper. The peer reviewers were Stuart Mumfork (@cadair), Trevor Bekolay (@tbekolay), and Yan Grange (@ygrange). The editor was Kyle Niemeyer (@kyleniemeyer). The unyt development team thank our reviewers and editor for their help getting the unyt paper out the door as well as for the numerous comments and suggestions that improved the paper and package as a whole.

In addition we’d like to thank Mike Zingale, Meagan Lang, Maksin Ratkin, DougAJ4, Ma Jianjun, Paul Ivanov, and Stephan Hoyer for reporting issues.

• Added docstrings for the custom exception classes defined by unyt. See PR #44.
• Added improved documentation to the contributor guide on how to run the tests and what the PR review guidelines are. See PR #43.
• Updates to the text of the method paper in response to reviewer suggestions. See PR #42.
• It is now possible to run the tests on an installed copy of unyt by executing unyt.test(). See PR #41.
• Minor edit to LICENSE file so GitHub recognizes it. See PR #40. Thank you to Kyle Sunden (@ksunden) for the contribution.
• Add spatial frequency as a dimension and added support in the spectral equivalence for the spatial frequency dimension. See PR #38 Thank you to Kyle Sunden (@ksunden) for the contribution.
• Add support for Python 3.7. See PR #37.
• Importing unyt will now fail if numpy and sympy are not installed. See PR #35
• Testing whether a unit name is contained in a unit registry using the Python in keyword will now work correctly for all unit names. See PR #31.
• The aliases for megagram in the top-level unyt namespace were incorrectly set to reference kilogram and now have the correct value. See PR #29.
• Make it possible to take scalars to dimensionless array powers with a properly broadcasted result without raising an error about units. See PR #23.
• Whether or not a unit is allowed to be SI-prefixable (for example, meter is SI-prefixable to form centimeter, kilometer, and many other units) is now stored as metadata in the unit registry rather than as global state inside unyt. See PR #21.
• Made adjustments to the rules for converting between CGS and MKS E&M units so that errors are only raised when going between unit systems and not merely when doing a complicated unit conversion invoving E&M units. See PR #20.
• round(q) where q is a unyt_quantity instance will no longer raise an error and will now return the nearest rounded float. See PR #19.
• Fixed a typo in the readme. Thank you to Paul Ivanov (@ivanov) for the fix.
• Added smoot as a unit. See PR #14.

## 1.0.4 (2018-06-08)¶

• Expand installation instructions
• Mention paper and arxiv submission in the readme.

## 1.0.3 (2018-06-06)¶

• Fix readme rendering on pypi

## 1.0.2 (2018-06-06)¶

• Added a paper to be submitted to the Journal of Open Source Software.