v3.0 alpha 0 (pre-release)

Highlights

This is the first pre-release in the Mesa 3.0 series, which is still in active development. The v3.0.0a0 pre-release can help active Mesa developers help starting to test the latest features in their models.

Since it's in active development, more breaking changes may follow and it's not recommended for general usage.

There are two major breaking changes at this point:

• The old visualisation is removed, in favor of the new, Solara based, Jupyter Viz. This was already available in the 2.3.x release series, but is now stabilized. Checkout out our new Visualization Tutorial. More examples and a migration guide will follow later in the Mesa 3.0 development.
• The mesa.flat namespace is removed, since was not used very often.

Mesa 3.0 will require Python 3.10+.

This pre-release can be installed with pip install mesa --upgrade --pre.

What's Changed

⚠️ Breaking changes

• Remove mesa.flat namespace by @rht in #2091
• breaking: Remove visualization_old (mesa-viz-tornado) by @rht in #2133

🎉 New features added

• Set JupyterViz as stable by @rht in #2090

🐛 Bugs fixed

• Jupyter_viz: Allow measures to be None by @EwoutH in #2163
• Jupyter Viz: Don't avoid interactive backend by @EwoutH in #2165

📜 Documentation improvements

• Fix image on landing page of docs. by @jackiekazil in #2146
• Replace links in docs - google group to matrix. by @jackiekazil in #2148
• Update visualisation docs by @EwoutH in #2162

🔧 Maintenance

• CI: Add weekly scheduled run to all CI workflows by @EwoutH in #2130
• Drop support for Python 3.9, require Python >= 3.10 by @EwoutH in #2132
• Add script to list unlabeled PR's since latest release by @rht in #2047

New Contributors

• @stephenfmann made their first contribution in #2154

Full Changelog: v2.3.1...v3.0.0a0