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overthesun / simoc

A scalable model of an interactive, off-world community
https://ngs.simoc.space/
GNU General Public License v3.0
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Bump mesa from 1.1.1 to 2.2.0 #474

Closed dependabot[bot] closed 8 months ago

dependabot[bot] commented 8 months ago

Bumps mesa from 1.1.1 to 2.2.0.

Release notes

Sourced from mesa's releases.

v2.2.0

Highlights

The 2.2.0 release of the Mesa library introduces several updates and new features for managing and scheduling agents and modelling the environment, along with an experimental release policy aimed at enhancing development speed and community feedback. Below are key highlights of the new (experimental) features in this release. Mesa 2.2.0 supports Python 3.9+.

Despite the minor version number, this is one of our biggest releases yet.

Experimental feature policy (discussion #1909)

This release introduces an experimental feature policy aimed at accelerating development and gathering community feedback. Features like #1890, #1898, and #1916 are marked as experimental under this policy.

Policy overview:

  • Experimental features can be added or changed in any release, even patch releases.
  • They don’t need a diligent review for every change, allowing for quicker development cycles.
  • Community feedback is encouraged through discussion threads.

Native support for multiple Agent types (PR #1894)

This update introduces a agents variable to the Mesa Model class, offering a first step in supporting multiple agent types as first class citizens. Each Model is now initialized with an self.agents variable (an AgentSet) in which all the agents are tracked. You can now always ask which agents are in the model with model.agents. It's the foundation which will allow us to solve problems with scheduling, data collection and visualisation of multiple agent types in the future.

🧪 AgentSet class (PR #1916)

The new AgentSet class encapsulates and manages collections of agents, streamlining the process of selecting, sorting, and applying actions to groups of agents.

Key features:

  • Flexible and efficient agent management and manipulation.
  • Methods like select, shuffle, sort, and do for intuitive operations.

Example:

# Applying a method to each agent
model.agents.do('step')

Filtering and shuffling agents


shuffled_agents = model.agents.select(lambda agent: agent.attribute > threshold).shuffle()

The AgentSet is an experimental feature. We would love feedback on it in #1919.

🧪 PropertyLayer and _PropertyGrid (PR #1898)

The introduction of PropertyLayer and the extension of SingleGrid and MultiGrid classes to support cell properties mark a significant enhancement in Mesa's environmental modeling capabilities. It allows to add different layers of variables to grids, that can be used to represent spatial environmental properties, such as elevation, pollution, flood levels or foliage.

Key features:

  • Efficient management of environmental properties like terrain types and resources.
  • Dynamic interaction between agents and their environment.
  • Fast modification and selection of cells based on one or multiple properties

Example:

from mesa.space import SingleGrid, PropertyLayer

grid = SingleGrid(10, 10, False)
property_layer = PropertyLayer("elevation", 10, 10, default_value=0)
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Changelog

Sourced from mesa's changelog.

2.2.0 (2024-01-09)

Highlights

This release incorporates several majors changes to Mesa. Notably, this provides two experimental features. (1) It reimagines Mesa's agent handling to have agents in the model class and store them in sets (you may submit feedback at https://github.com/projectmesa/mesa/discussions/1919). The intent is to make Mesa more efficient and give users more control over agent scheduling to allow for innumerable options. (2) It adds property layer and property grid so users can layer on multiple grids making Mesa and Geo-Mesa more similar (you may submit feedback at https://github.com/projectmesa/mesa/discussions/1932).

What's Changed

🧪 Experimental features

🛠 Enhancements made

🐛 Bugs fixed

📜 Documentation improvements

🔧 Maintenance

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.1.5...v2.2.0

2.1.5 (2023-11-26)

This release has some critical fixes to JupyterViz/Solara frontend to prevent flickering and improve the display of the jupyter plots. It also has improvements to datacollection and the documentation.

Improvements

  • datacollection: check if model reporters is a partial function (#1872)

Docs and Tutorial

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Commits


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dependabot[bot] commented 8 months ago

Superseded by #477.