# Release notes for cobrapy 0.18.0

## New features

* Support writing SBML notes on model objects

## Fixes

* Test alternative solver
* Handle repeated infeasible optimizations in `minimal_medium`
* Allow newline characters in SBML notes

## Backwards incompatible changes

* Change the container type of `groups` from `set` to `DictList`
* Expect annotation attributes to be of type `dict`

## Internal

* Update Travis CI configuration
* Add Python 3.8 to PyPI classifiers

## Contributors

* @BenjaSanchez
* @cdiener
* @ecederstrand
* @Hemant27031999

