Please mention any changes to the code which will break users' code here - to be put in the release notes for the next release. Also mention any significant improvements or new features.

The real definitive release notes will be written in source:trunk/docs/ReleaseNotes.html​ at the time of release. To make that process easier, please structure this page in the same manner, rather than simply copying from LatestNews.

OlderReleaseNotes -- release notes for previous releases.

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(changes since Release 2019.1)

Headline features

• Chaste has now been updated to Python3 (3.5+).
  • New dependancies (which most systems will already have):
    • python3
    • python3-venv
    • python3-pip
  • The following Python2 dependancies are no longer required:
    • python-devel
    • python-lxml
    • python-amara
    • python-rdflib
    • python-dateutil

• New git submodule: a new git submodule has been introduced to contain some cardiac CellML-related stuff which we share with other projects. This means that from now on, when cloning chaste from a git repository, you have to add the --recursive flag. e.g. git clone --recursive -b release https://chaste.cs.ox.ac.uk/git/chaste.git Chaste. If you already have a clone locally, you'll need to run git submodule update --init. Occasionally developers will need to do a submodule update too, but a test has been introduced which should fail and tell you when this is the case. Details in #3024.

New dependency support

Core

Heart

• The CellML to Chaste hpp/cpp converter was PyCML (based on Python 2) this has been replaced by chaste_codegen (​https://github.com/ModellingWebLab/chaste-codegen, based on Python 3), which has some nice features like no longer needing Maple to compute Analytic Jacobians. See ChasteGuides/CodeGenerationFromCellML for info on how to use this new library at the command line, but no changes needed unless you were using PyCML manually.

Future Plans