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Release History

3.1.0 (2024-12-04)

Highlights

With Mesa 3.1.0 we're back on our regular release schedule after the big Mesa 3.0 release, with some exciting new features.

This release adds experimental support for Observables and Computed, enabling a more reactive and responsive programming model for agent-based simulations. The new Observable and Computable classes allow developers to declaratively define attributes that automatically emit signals when their values change, and compute derived values that update dynamically. This lays the groundwork for more advanced event handling and data visualization features in future releases (#2291).

The experimental cell space module has been updated with full support for n-dimensional property layers. These allow agents to easily interact with and modify spatial properties of the environment, such as terrain, resources, or environmental conditions. The new implementation provides a more intuitive attribute-based API and ensures tight integration with the cell space architecture (#2512).

Mesa now includes built-in support for logging using the standard Python logging module. This provides developers with a flexible and powerful way to add structured diagnostic and debug output to their simulations, without the need for custom logging solutions. The logging system is integrated throughout the library, including the new SolaraViz visualization system (#2506).

Creating multiple agents with varying initialization parameters is now significantly easier with the new Agent.create_agents class method. This factory function supports both uniform and per-agent parameters, simplifying the code required to set up a simulation with a large number of heterogeneous agents (#2351).

In addition to the major new features, this release includes a number of smaller enhancements and bug fixes that improve the overall developer experience. These include removing deprecated functionality, cleaning up examples, and addressing various edge cases reported by the community. Mesa 3.1 requires Python 3.11 or higher.

What's Changed

🧪 Experimental features

🎉 New features added

🔍 Examples updated

📜 Documentation improvements

🔧 Maintenance

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.3...v3.1.0

3.0.3 (2024-11-14)

Highlights

A small bugfix release that fixes two bugs.

What's Changed

🧪 Experimental features

🐛 Bugs fixed

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.2...v3.0.3

3.0.2 (2024-11-11)

Highlighst

Mesa 3.0.2 is a small follow-up patch release, in which we fixed a lot of small bugs in the example models their visualisation, and improved their testing.

What's Changed

🐛 Bugs fixed

  • allow components as a positional argument again by @Corvince in projectmesa#2488

🔍 Examples updated

🔧 Maintenance

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.1...v3.0.2

3.0.1 (2024-11-11)

Highlights

After our huge 3.0.0 release, Mesa 3.0.1 follows up with two improvements to experimental features, examples and docs.

What's Changed

🧪 Experimental features

🛠 Enhancements made

🔍 Examples updated

📜 Documentation improvements

  • docs/tutorial: Replace scheduler in MoneyModel by @EwoutH in projectmesa#2475
  • docs: update migration_guide.md by @eltociear in projectmesa#2480
  • Update some DeprecationWarnings to note they are removed in Mesa 3.1 by @EwoutH in projectmesa#2481

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0...v3.0.1

3.0.0 (2024-11-09)

Highlights

Mesa 3.0 brings major improvements to agent-based modeling, making it more intuitive and powerful while reducing complexity. This release modernizes core functionalities and introduces new capabilities for both beginners and advanced users.

Streamlined agent management

The centerpiece of Mesa 3.0 is its new agent management system. Agents are now automatically tracked and assigned unique IDs, eliminating common boilerplate code. The new AgentSet functionality provides an elegant and flexible way to work with agents, for example:

# Find agents meeting specific criteria
wealthy_agents = model.agents.select(lambda a: a.wealth > 1000)

# Group and analyze agents
grouped = model.agents.groupby("state")
state_stats = grouped.agg({
     "count": len,
     "avg_age": ("age", np.mean),
     "total_wealth": ("wealth", sum)
 })

# Activate agents in different patterns
model.agents.shuffle_do("step")  # Random activation
model.agents.select(lambda a: a.energy > 0).do("move")  # Conditional activation

The AgentSet provides powerful methods for filtering, grouping, and analyzing agents, making it easier to express complex model logic. Each model automatically maintains an AgentSet containing all agents (model.agents) and separate AgentSets for each agent type (model.agents_by_type). See the full AgentSet docs here.

Modern Visualization with SolaraViz

Mesa 3.0's new experimental visualization system, SolaraViz, provides a modern, interactive interface for model exploration:

from mesa.visualization import SolaraViz, make_space_component, make_plot_component

visualization = SolaraViz(
    model,
    [
        make_space_component(agent_portrayal),
        make_plot_component(["population", "average_wealth"]),
        lambda m: f"Step {m.steps}: {len(m.agents)} agents"  # Custom text component
    ],
    model_params=parameter_controls
)

Key visualization features:

  • Interactive browser-based interface with real-time updates
  • Support for both grid-based and network models
  • Visualization of PropertyLayers and hexagonal grids
  • Custom components using Matplotlib or text
  • Improved performance and responsiveness

Check out the Visualization Tutorial to get started.

Note: SolaraViz is in active development. We might make API breaking changes between Mesa 3.0 and 3.1.

Enhanced data collection

The DataCollector now supports collecting different metrics for different agent types, using agenttype_reporters:

self.datacollector = DataCollector(
    model_reporters={"total_wealth": lambda m: m.agents.agg("wealth", sum)},
    agent_reporters={"age": "age", "wealth": "wealth"},
    agenttype_reporters={
        Predator: {"kills": "kills_count"},
        Prey: {"distance_fled": "total_flight_distance"}
    }
)

Experimental features

Mesa 3.0 introduces several experimental features for advanced modeling:

These experimental features are in active development and might break API between releases.

Breaking changes

See our Mesa 3.0 migration guide for a full overview.

If you want to move existing models from Mesa 2.x to 3.0, there are a few things you have to change.

  1. Models must explicitly initialize the Mesa base class:
class MyModel(mesa.Model):
    def __init__(self, n_agents, seed=None):
        super().__init__(seed=seed)  # Required in Mesa 3.0
  1. Agents are created without manual ID assignment:
# Old
agent = MyAgent(unique_id=1, model=self)
# New
agent = MyAgent(model=self)
  1. Scheduler replacement with AgentSet operations:
# Old (RandomActivation)
self.schedule = RandomActivation(self)
self.schedule.step()

# New
self.agents.shuffle_do("step")

# Old (SimultaneousActivation)
self.schedule = SimultaneousActivation(self)
self.schedule.step()

# New
self.agents.do("step")
self.agents.do("advance")

Furthermore:

  • Steps counter automatically increments
  • mesa.flat namespace removed
  • Python 3.10+ required
  • Reserved model variables (agents, steps, etc.) protected
  • Simplified DataCollector initialization
  • Old visualization system replaced by SolaraViz

Getting Started

Install Mesa 3.0:

pip install --upgrade mesa

If building a new model, we recommend checking out the updated Mesa Overview and Introductory Tutorial.

For updating existing models, we recommend upgrading in steps:

  1. Update to latest Mesa 2.x
  2. Address deprecation warnings
  3. Upgrade to Mesa 3.0
  4. Replace schedulers with AgentSet functionality

A detailed migration guide is available to help moving to Mesa 3.0. For questions or support, join our GitHub Discussions or Matrix Chat.

We would love to hear what you think about Mesa 3.0! Say hello here and leave any feedback on 3.0 here.

3.0.0rc0 (2024-11-06)

Highlights

We're releasing the Mesa 3.0 Release Candidate, ready for final testing before we release Mesa 3.0 later this week!

In this last 3.0 pre-release, the visualisation has been thoroughly updated, with a brand new API. Visualizing the experimental Cell Space, including PropertyLayers and hexogonal grids, is now also supported.

We're still working very active on the visualisation, so we have marked that experimental for Mesa 3.0. We will stabilize SolaraViz in Mesa 3.1.

Any feedback and last-minute bug reports are welcome here.

What's Changed

⚠️ Breaking changes

🧪 Experimental features

🛠 Enhancements made

🐛 Bugs fixed

🔍 Examples updated

📜 Documentation improvements

🔧 Maintenance

  • remove deprecated HexGrid class by @quaquel in projectmesa#2441
  • rename make_plot_measure to make_plot_component and add some kwargs by @quaquel in projectmesa#2446

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0b2...v3.0.0rc0

3.0.0b2 (2024-10-26)

Highlights

Mesa 3.0 beta 2 includes major work on the example models, docs, a new tutorial and visualisation.

The included example models are now part of the Mesa package itself and directly importable, using:

from mesa.examples import BoidFlockers, BoltzmannWealthModel, ConwaysGameOfLife, ...

The advanced examples were also restructured and cleaned up.

The tutorial was completely rewritten for Mesa 3.0, including it's latest features and practices. Many of our other docs also received some love, and almost everything is now ready for Mesa 3.0.

A new feature to remove all agents from the model was added, and the visualisation now supports drawing the experimental discrete spaces in both matplotlib and altair. All agents which are in a space can now conveniently be accessed with .agents.

The rarely used mesa startproject cookiecutter feature was removed. We updated our best-practice guide to include how to structure a modern Mesa project, which is now very straightforward.

What's Changed

⚠️ Breaking changes

🧪 Experimental features

🎉 New features added

🛠 Enhancements made

🐛 Bugs fixed

🔍 Examples updated

📜 Documentation improvements

🔧 Maintenance

  • Add empty pull_request_template.md to enable PR template chooser by @EwoutH in projectmesa#2409

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0b1...v3.0.0b2

3.0.0b1 (2024-10-17)

Highlights

Mesa 3.0 beta 1 is our last beta release before the Mesa 3.0 stable release. We are restructuring our examples and have move 9 core examples from mesa-examples to mesa itself (#2358). The 5 basic examples are now directly importable (#2381):

from examples.basic import BoidFlockers, BoltzmannWealthModel, ConwaysGameOfLife, Schelling, VirusOnNetwork

The 5 basic examples will always use stable Mesa features, we are also working on 4 more advanced example which can also include experimental features.

All our core examples can now be viewed in the examples folder. mesa-examples will continue to exists for user showcases. We're also working on making the examples visible in the ReadtheDocs (#2382) and on an website (mesa-examples#139). Follow all our work on the examples in this tracking issue #2364.

Furthermore, the visualizations are improved by making visualization elements scalable and more clearly labeling the plots, and the Model now has an rng argument for an SPEC 7 compliant NumPy random number generator (#2352). Following SPEC 7, you have to pass either seed or rng. Whichever one you pass will be used to seed both random.Random, and numpy.random.Generator.

What's Changed

⚠️ Breaking changes

🧪 Experimental features

  • cell space: Add convenience properties for grid width and height by @quaquel in projectmesa#2348
  • Bugfix for deepcopy / pickling discrete spaces by @quaquel in projectmesa#2378

🎉 New features added

  • Move core example models back (v2) by @EwoutH in projectmesa#2358
  • Add Model.rng for SPEC-7 compliant numpy random number generation by @quaquel in projectmesa#2352

🛠 Enhancements made

🐛 Bugs fixed

  • experimental init: Fix Solara import by making it lazy by @EwoutH in projectmesa#2357
  • fix: pass model.random to schedulers by @quaquel in projectmesa#2359
  • fix: register agent after creating unique_id and pos attributes by @wang-boyu in projectmesa#2368
  • solara: viz tutorial: fix histogram code by @Corvince in projectmesa#2379

🔍 Examples updated

📜 Documentation improvements

🔧 Maintenance

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0b0...v3.0.0b1

3.0.0b0 (2024-10-04)

Highlights

We're proud to release the first Mesa 3.0 beta! This pre-release announces that we're ready for Mesa 3.0 to be tested by all our regular users. We try to not making breaking changes anymore, but focus on resolving bugs and imperfections.

In this beta, not so much has changed as in the alphas (we're stabilizing, that's a good sign), but there are still a few notable things:

  • Agents now have to be initialized without their unique_id. See #2328 and the Migration guide.
  • PropertyLayers can now be visualized! See #2336 for details and some examples, and mesa-examples#214 as a simple example model.
  • We reduced the core dependencies of Mesa, so that's a lighter and simpler install. You can now use extras to install the dependencies, for example add [viz] to install all visualisation dependencies: pip install -U --pre mesa[viz]. See #2265 for details.
  • The Mesa Overview as fully updated for 3.0. We highly recommend reading though it!
  • We made some more progress on the experimental Cell Space, adding movement and integrating the PropertyLayer. Among others, Agents have nu initial movement capabilities for grids. Development continues during the betas and

We plan to release one or two more beta's in the coming weeks, and tag a release candidate and Mesa 3.0 late October. In the v3.0 milestone are the critical items on our todo-list.

You can install this pre-release as usual with:

pip install --upgrade --pre mesa

We're very curious what you think, try it out and ask any questions or share any feedback here!

What's Changed

⚠️ Breaking changes

  • update Agent.__init__ to remove deprecation warning by @quaquel in projectmesa#2328

🎉 New features added

🧪 Experimental features

🛠 Enhancements made

  • Reduce core dependencies, split in optional dependencies by @EwoutH in projectmesa#2265

🐛 Bugs fixed

  • viz: stop running and disable buttons when model.running is False by @wang-boyu in projectmesa#2332

📜 Documentation improvements

🔧 Maintenance

  • tests: Resolve warnings by removing scheduler and updating arguments by @EwoutH in projectmesa#2329
  • add super call to Model and remove self.schedule by @quaquel in projectmesa#2334

Other changes

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a5...v3.0.0b0

3.0.0a5 (2024-09-21)

Highlights

Mesa v3.0 alpha 5 release contains many quality of life updates, a big new feature for the DataCollector and a major deprecation.

The entire mesa.time module, including all schedulers, has been deprecated (#2306). Users are encouraged to transition to AgentSet functionality for more flexible and explicit agent activation patterns. Check the migration guide on how to upgrade.

The DataCollector now supports collecting data from specific Agent subclasses using the new agenttype_reporters parameter (#2300). This allows collecting different metrics for different agent types. For example:

self.datacollector = DataCollector(
    agenttype_reporters={
        Wolf: {"sheep_eaten": "sheep_eaten"},
        Sheep: {"wool": "wool_amount"}
    }
)

Furthermore, a new shuffle_do() method for AgentSets provides a faster way to perform shuffle().do() (#2283). The GroupBy class gained count() and agg() methods to count the number of agents in groups and aggregate variables of them (#2290).

In the experimental Cell Space, the CellCollection.select method was updated to use at_most instead of n, aligning with the AgentSet API (#2307). Additionally, the Cell class now features a dedicated neighborhood property for direct neighbors (default radius=1) and a get_neighborhood method for larger radii (#2309).

Finally, SolaraViz received updates improving its interface and performance (#2299, #2304). Cell connections in grids and networks are now public and named for more intuitive agent movements (#2296). The Model class initialization process was simplified by moving random seed and random object creation to __init__ (#1940). Documentation has been extensively updated, including enforcing Google docstrings (#2294) and reorganizing the API documentation (#2298) for better clarity and navigation.

While the Mesa 3.0 timeline is still being discussed, we're aiming at the first Mesa 3.0 beta in October followed by a stable release in November. Testing new features and sharing feedback is appreciated!

What's Changed

🎉 New features added

🛠 Enhancements made

🧪 Experimental features

  • Update to CellCollection.select by @quaquel in projectmesa#2307
  • Have a dedicated neighborhood property and a get_neighborhood method on Cell by @quaquel in projectmesa#2309

📜 Documentation improvements

  • Enforce google docstrings by @quaquel in projectmesa#2294
  • Api docs by @quaquel in projectmesa#2298
  • update migration guide to describe solaraviz updates by @Corvince in projectmesa#2297
  • Migration Guide: Add Model initialization requirement and automatic Agent.unique_id assignment by @EwoutH in projectmesa#2302
  • Deprecate Time module and all its Schedulers by @EwoutH in projectmesa#2306
  • intro_tutorial: Don't initialize agents with an unique_id by @EwoutH in projectmesa#2315
  • Migration guide: Intro, upgrade strategy, model.agents, headers by @EwoutH in projectmesa#2314

🔧 Maintenance

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a4...v3.0.0a5

3.0.0a4 (2024-09-09)

Highlights

Mesa 3.0.0a4 contains two major breaking changes:

  1. The Agent's unique_id is now automatically assigned, so doesn't need to be passed to the Agent class anymore. In a subclassed custom Agent, like normally used, this now looks like this:

    class Wolf(Agent):
-    def __init__(self, unique_id, model, energy=None):
+    def __init__(self, model, energy=None):
        # When initializing the super class (Agent), passing unique_id isn't needed anymore
-        super().__init__(unique_id, model)
+        super().__init__(model)

- wolf = Wolf(unique_id, model)
+ wolf = Wolf(model)

    Example models were updated in mesa-examples#194, which shows more examples on how to update existing models.

  2. Our visualisation API is being overhauled, to be more flexible and powerful. For more details, see #2278.

    • An initial update to the tutorial was made in #2289 and is available here.
    • An initial example model was updated in mesa-examples#195, and more examples will be updated in mesa-examples#195.
    • The old SolaraViz API is still available at mesa.experimental, but might be removed in future releases.

Furthermore, the AgentSet has a new agg method to quickly get an aggerate value (for example min_energy = model.agents.agg("energy", min)) (#2266), The Model get_agents_of_type function is replaced by directly exposing the agents_by_type property (which can be accessed as a dict) (#2267, mesa-examples#190) and the AgentSet get() methods can now handle missing values by replacing it with a default value (#2279).

Finally, it fixes a bug in which the Grid's move_agent_to_one_of method with selection="closest" selected a location deterministically, instead of randomly (#2118).

What's Changed

⚠️ Breaking changes

🎉 New features added

🛠 Enhancements made

🐛 Bugs fixed

  • Fix deterministic behavior in move_agent_to_one_of with selection="closest" by @OrenBochman in projectmesa#2118

📜 Documentation improvements

  • docs: Fix Visualization Tutorial (main branch) by @EwoutH in projectmesa#2271
  • Docs: Fix broken relative links by removing .html suffix by @EwoutH in projectmesa#2274
  • Readthedocs: Don't let notebook failures pass silently by @EwoutH in projectmesa#2276
  • Update viz tutorial to the new API by @Corvince in projectmesa#2289

🔧 Maintenance

  • Resolve multiprocessing warning, state Python 3.13 support by @rht in projectmesa#2246

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a3...v3.0.0a4

3.0.0a3 (2024-08-30)

Highlights

Developments toward Mesa 3.0 are steaming ahead, and our fourth alpha release is packed with features and updates - only 8 days after our third.

Mesa 3.0.0a3 contains one breaking change: We now automatically increase the steps counter by one at the beginning of each Model.steps() call. That means increasing steps by hand isn't necessary anymore.

The big new features is the experimental Voronoi grid that @vitorfrois implemented in #2084. It allows creating cells in a Voronoi layout as part of the experimental cell space. An example using it to model Cholera spread can be found here.

The AgentSet got a lot of love with two brand new methods: .groupby() to split in groups (#2220) and .set() to easily assign variables to all agents in that set (#2254). The select() method is improved by allowing to select at most a fraction of the agents (#2253), and we split the do() method in do() and map() to make a distinction between the return types (#2237).

Furthermore, we improved the performance of accessing Model.agents, squashed a bug in SolaraViz, started testing on Python 3.13 and added a new benchmark model.

Our example models also got more love: We removed the RandomActivation scheduler in 14 models and removed SimultaneousActivation in 3 models (examples#183). They now use the automatic step increase and AgentSet functionality. We started testing our GIS model in CI (examples#171) and resolved a lot of bugs in them (examples#172, help appreciated!).

Finally, we have two brand new examples: An Ant Colony Optimization model using an Ant System approach to the Traveling Salesman problem, a Mesa NetworkGrid, and a custom visualisation with SolaraViz (examples#157 by @zjost). The first example using the PropertyLayer was added, a very fast implementation of Conway's Game of Life (examples#182).

To help the transition to Mesa 3.0, we started writing a migration guide. Progress is tracked in #2233, feedback and help is appreciated! Finally, we also added a new section to our contributor guide to get new contributors up to speed.

This pre-release can be installed as always with pip install --pre mesa

What's Changed

⚠️ Breaking changes

🧪 Experimental features

🎉 New features added

🛠 Enhancements made

  • Split AgentSet into map and do to separate return types by @quaquel in projectmesa#2237
  • Performance enhancements for Model.agents by @quaquel in projectmesa#2251
  • AgentSet: Allow selecting a fraction of agents in the AgentSet by @EwoutH in projectmesa#2253

🐛 Bugs fixed

  • SolaraViz: Reset components when params are changed by @rht in projectmesa#2240

📜 Documentation improvements

🔧 Maintenance

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a2...v3.0.0a3

3.0.0a2 (2024-08-21)

Highlights

In Mesa 3.0 alpha 2 (v3.0.0a2) we've done more clean-up in preparation for Mesa 3.0. We now require super().__init__() to run on initializing a Mesa model subclass, Model.agents is now fully reserved for the Model's internal AgentSet and we fixed a bug in our Solara space_drawer.

A new feature was added in #2219, which now also allows AgentSet.do() to take any callable function, instead of only a string referencing to an Agent method. The argument name was changed from method_name to method.

The new Solara visualisation now allows portraying agents in different shapes, checkout some examples in #2214.

We're also working hard on our example models. All model warnings were resolved and we've replaced a lot of schedulers with simpler and more flexible AgentSet functionality. Checkout our open issues if you want to help improve our example models further!

What's Changed

⚠️ Breaking changes

  • breaking: Add dependencies argument to custom space_drawer by @rht in projectmesa#2209
  • Require Mesa models to be initialized with super().__init__() by @EwoutH in projectmesa#2218
  • Allow AgentSet.do() to take Callable function by @quaquel in projectmesa#2219
  • Change warning when setting model.agents to error by @EwoutH in projectmesa#2225

🧪 Experimental features

  • devs/eventlist: Add repr method to print EventList pretty by @EwoutH in projectmesa#2195

🛠 Enhancements made

  • Visualisation: Allow specifying Agent shapes in agent_portrayal by @rmhopkins4 in projectmesa#2214

📜 Documentation improvements

  • docs/conf.py: Use modern intersphinx_mapping format by @EwoutH in projectmesa#2206
  • docs: Update Readme and tutorials to mention Mesa 3.0 pre-releases by @EwoutH in projectmesa#2203

🔧 Maintenance

  • CI: Let pytest treat warnings as errors for examples by @EwoutH in projectmesa#2204

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a1...v3.0.0a2

3.0.0a1 (2024-08-01)

Highlights

Mesa 3.0 alpha 1 (v3.0.0a1) is another step towards our next major version. This release introduces a name change from JupyterViz (jupyter_viz) to SolaraViz (solara_viz), to better represent the tech stack being used. It also includes two bugfixes also present in 2.3.2.

What's Changed

⚠️ Breaking changes

  • viz: Combine code for rendering in browser and Jupyter by @rht in projectmesa#2180

🛠 Enhancements made

🐛 Bugs fixed

📜 Documentation improvements

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v3.0.0a0...v3.0.0a1

3.0.0a0 (2024-07-04)

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

🎉 New features added

🐛 Bugs fixed

📜 Documentation improvements

🔧 Maintenance

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

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.3.1...v3.0.0a0

2.3.2 (2024-07-22)

Highlights

Mesa 2.3.2 is a small patch release which fixes two bugs, one to the batch_run function still depending on schedule.steps, and one in the agent marker visualisation.

What's Changed

🐛 Bugs fixed

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.3.1...v2.3.2

2.3.1 (2024-07-03)

Highlights

Mesa 2.3.1 is a small patch release with a datacollector bug fixed and improved documentation.

What's Changed

🐛 Bugs fixed

  • datacollector: store separate snapshots of model data per step by @EwoutH in projectmesa#2129

📜 Documentation improvements

  • Add experimental features to documentation as per #2122 by @stephenfmann in projectmesa#2154

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.3.0...v2.3.1

2.3.0 (2024-04-23)

Highlights

Mesa 2.3.0 is a big feature release and the last feature release before 3.0.

There are two main new features:

  • The experimental cell-centric discrete spaces, as added in #1994. It allows having cells with not only properties but also active behaviors: the CellAgent. Its inspired by NetLogo's patches but extend and generalize this concept further.
  • Full support for discrete event scheduling, as added in #2066. It allows scheduling events (like Agent actions) at any time, including non-integer timesteps.

There are a lot of other features: The Jupyter visualisation now supports easier way to specify sliders, NetworkGrid.get_neighbors() supports a radius, AgentSet.get() can retrieve multiple attributes and there are now benchmarks to track Mesa performance during development.

Finally, 2.3.0 stabilizes the AgentSet (including model.agents), making it the first experimental Mesa feature that is taken out of it's experimental phase.

Install this release with:

pip install --upgrade mesa

The Mesa 2.3.x-series supports Python 3.9 to 3.12. The next major release will require Python 3.10.

What's Changed

🧪 Experimental features

  • Add cell-centric discrete spaces (experimental) by @Corvince in projectmesa#1994

🎉 New features added

🛠 Enhancements made

  • JupyterViz: Automatically deduce display name from model class by @rht in projectmesa#1975
  • Add radius argument to NetworkGrid.get_neighbors() by @EwoutH in projectmesa#1973
  • Speedup of Agentset.shuffle by @quaquel in projectmesa#2010
  • feat: Let mesa runserver detect server.py as fallback by @rht in projectmesa#2015
  • JupyterViz: {Convert make_plot & prepare ColorCard} to become Solara component by @rht in projectmesa#2020
  • new feature: AgentSet.get can retrieve one or more then one attribute by @quaquel in projectmesa#2044
  • Update CODE_OF_CONDUCT.md to version 2+ of contrib covenant by @jackiekazil in projectmesa#2052
  • Improve flocking benchmark by @coderbeta1 in projectmesa#2054
  • Remove JupyterViz Altair marker overlap for huge grid size by @rht in projectmesa#2062
  • Add tooltip option to Altair chart by @FoFFolo in projectmesa#2082
  • feat: Display model seed & allow user to specify it in JupyterViz by @rht in projectmesa#2069
  • warn if placing already placed agent by @puer-robustus in projectmesa#2083

🐛 Bugs fixed

📜 Documentation improvements

  • Improve readability of badges by @rht in projectmesa#2009
  • More pythonic implementation of wolf sheep by @quaquel in projectmesa#2011
  • Adding super().init() to MoneyModel tutorial by @sw23 in projectmesa#2025
  • docs: Convert howto.rst -> howto.md via rst2myst by @rht in projectmesa#2033
  • docs: Convert best-practices,overview,packages,mesa,index to .md via rst2myst by @rht in projectmesa#2034
  • docs: Convert api/.rst -> api/.md via rst2myst by @rht in projectmesa#2035
  • docs: Rewrite howto.md using ChatGPT for clarity and conciseness by @rht in projectmesa#2037
  • docs: Corrected Contributing Guide Link to Ensure Accessibility by @sahusiddharth in projectmesa#2057
  • Rename links to internal .rst files to .md by @rht in projectmesa#2058
  • docs: improve introductory tutorial by @puer-robustus in projectmesa#2087

🔧 Maintenance

Other changes

New Contributors

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.2.4...2.3.0

2.3.0-rc1 (2024-04-18)

Mesa 2.3.0-rc1 is pre-release in preparation for 2.3.0 stable. It had the same release notes as 2.3.0.

2.2.4 (2024-01-26)

Highlights

Mesa v2.2.4 is a small but important bugfix release for the 2.2 release series. It fixes an essential bug in where agents weren't shuffled in the BaseScheduler, affecting mainly the RandomActivation scheduler (effectively making it sequential activation)(#2007). It also fixes a small behaviour change in RandomActivationByType.agents_by_type() (#1996). Furthermore, this release adds an internal clock to the Model, which allows to use a Mesa model without a scheduler (using the AgentSet API)(#1942).

Updating from previous 2.2 releases is highly recommended, especially when using the RandomActivation scheduler.

What's Changed

🛠 Enhancements made

  • refactor: Remove dependence on model.schedule, add clock to Model by @rht in projectmesa#1942

🐛 Bugs fixed

  • Fix AgentSet inplace shuffle (and thus RandomActivation), add tests by @EwoutH and @quaquel in projectmesa#2007
  • fix: Reverse dict key and value for agents_by_type by @rht in projectmesa#1996

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.2.3...v2.2.4

2.2.3 (2024-01-22)

Highlights

Mesa 2.2.3 is a small release with two improvements to the experimental Solara visualisation, on request of one of our contributors. No stable features have changed.

What's Changed

🧪 Experimental features

🐛 Bugs fixed

  • fix: Explicitly specify JupyterViz space view limits by @rht in projectmesa#1984

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.2.2...v2.2.3

2.2.2 (2024-01-22)

Highlights

Mesa 2.2.2 is a small bugfix release, for models in which users had defined Model.agents (self.agents in a Model (sub)class). This is deprecated, but for now allowed. See #1919 (comment).

What's Changed

🐛 Bugs fixed

  • Allow user models to assign Model.agents for now, but add warning by @quaquel in #1976

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.2.1...v2.2.2

2.2.1 (2024-01-16)

Highlights

After the huge 2.2.0 release we are releasing 2.2.1 which addresses a few bugs, unintended behaviors and a performance regression. #1960 makes sure agent addition and removal is handled correct, #1965 fixed an unintended behavior change in RandomActivationByType.agents_by_type and #1964 makes sure we're at least as fast as before 2.2.0, if not faster. The introduction tutorial is also extended with #1955.

We highly recommend updating to 2.2.1 if you're using 2.2.0.

What's Changed

🧪 Experimental features

🛠 Enhancements made

  • make mesa runable without some dependencies by @Corvince in projectmesa#1950
  • Improve performance of AgentSet and iter_cell_list_contents by @Corvince in projectmesa#1964

🐛 Bugs fixed

  • Bugfix in agentset to handle addition and removal correctly by @quaquel in projectmesa#1960
  • Make RandomActivationByType.agents_by_type backward compatible by @quaquel in projectmesa#1965

📜 Documentation improvements

🔧 Maintenance

Full Changelog: https://github.com/projectmesa/mesa/compare/v2.2.0...v2.2.1

2.2.0 (2024-01-09)

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)
grid.add_property_layer(property_layer)

# Modify multiple cells values
grid.properties["elevation"].modify_cells(np.multiply, 2)

# Select cells that have an elevation of at least 50
high_elevation_cells = grid.properties["elevation"].select_cells(condition=lambda x: x > 50)

The PropertyLayer is an experimental feature. We would love feedback on it in #1932.

🧪 DiscreteEventScheduler (PR #1890)

The DiscreteEventScheduler is an innovative addition to the Mesa time module, tailored for discrete event simulations. This scheduler advances simulations based on specific event timings rather than regular intervals, providing more flexibility in modeling complex systems.

Key Features:

  • Efficient handling of events scheduled for specific simulation times.
  • Randomized execution order for events scheduled at the same time.

The DiscreteEventScheduler is an experimental feature. We would love feedback on it in #1923.

What's Changed

🧪 Experimental features

🎉 New features added

🛠 Enhancements made

🐛 Bugs fixed

  • Work around for initializing model._agent by @quaquel in projectmesa#1928
  • Honor disabled space drawer option when rendering in the browser by @rlskoeser in projectmesa#1907

📜 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

  • docs: convert README from .rst to .md (#1881)
  • docs: convert HISTORY from .rst to .md (#1873)
  • docs: enhance docstrings for scheduler classes in mesa.time (#1866)

CI and WorkFlows

  • ci: Remove redundant Ruff workflow from GitHub Actions (#1880)
  • Replace Black with ruff format (#1880)
  • Migrate setup from setup.py to pyproject.toml (#1870)

Solara/JupyterViz

  • fix: Do render_in_jupyter on Colab env (#1884)
  • Convert make_space into Solara component (#1877)
  • remove controls for dragging and resizing (#1878)
  • Improve ColorCard layout (#1876)
  • refactor: Define current_step as reactive (#1875)
  • fix: optimize controller and plots to fill screen in jupyter (#1868)
  • fix: ensure space and plot subcomponent are not rendered on step (#1867)

2.1.4 (2023-11-7)

This release updates mesa-viz-tornado dependency v0.1.3. This removes the external JavaScript templates and prevents 404 errors

  • bugfix: ensure mesa_viz_tornado>=0.1.3 #1862

2.1.3 (2023-11-5)

This release contains several improvements, fixes, and new features to the JupyterViz/Solara frontend. It's a patch release instead of a minor release because the JupyterViz frontend is still considered experimental.

Improvements

  • model: ensure model is initialized with random seed based #1814
  • space: check if position values are tuples #1831
  • datacollection: add agent collection by type, documentation, and tests #1838

Docs and Tutorial

  • tutorial: explain how to set up reporter for multiple agents #1717
  • docs: rename useful snippets to how to guide #1839

CI and WorkFlows

  • Release CI: update to run workflows on releases #1479
  • CI: Update GHA workflows with Python 3.12 #1840
  • update ruff version #1824, #1841
  • Ensure mesa_viz_tornado>=0.1.2 #1860

Solara/JupyterViz

  • perf: increase speed of Solara render #1819
  • implement drawer for continuous space and refactor code #1830
  • fix: configure change handler for checkbox input #1844
  • fix: ensure playing starts after model param change #1851

2.1.2 (2023-09-23)

This release contains fixes, and several improvements and new features to the JupyterViz/Solara frontend. It's a patch release instead of a minor release because the JupyterViz frontend is still considered experimental.

Improvements

  • perf: Access grid only once #1751
  • docs: compile notebooks at build time #1753
  • docs: Remove nbsphinx and explicit .ipynb suffix #1754
  • rtd: Use gruvbox-dark as style #1719
  • build(deps): bump actions/checkout from 3 to 4 #1790

Solara/JupyterViz

  • solara: Implement visualization for network grid #1767
  • Add support for select input type #1779
  • Add step count display to JupyterViz #1775
  • Simplify solara code #1786
  • Add docstring for jupyterviz make_user_input that documents supported inputs #1784
  • Revise, test, & document JupyterViz options for drawing agent space #1783
  • Add UserInputs component #1788
  • Fix: Remove dict merge operator, python 3.8 compat #1793
  • feat: Add reset button to JupyterViz #1795
  • Add support for solara.Checkbox user input #1798
  • viz tutorial: Update custom plot to reflect new code #1799
  • fix: Don't continue playing when a model is reset #1796
  • Docker: Update to use Solara viz #1757

Refactors

  • Move viz stuff to mesa-viz-tornado Git repo #1746
  • simplify get neighborhood #1760
  • remove attrgetter performance optimization #1809

Fixes

  • fix: Add Matplotlib as dependency #1747
  • fix install for visualization tutorial in colab #1752
  • fix: Allow multiple connections in Solara #1759
  • Revert "Ensure sphinx>=7" #1762
  • fix README pic to remove line on left side #1763
  • space: Ensure get_neighborhood output & cache are immutable #1780
  • fix: Use .pytemplate for name for cookiecutter #1785
  • HISTORY.rst: Correct neighbor_iter() replacement in 2.0.0 #1807
  • docs: Always link to stable version #1810
  • Remove exclude_none_values #1813

2.1.1 (2023-08-02)

This release improves the introductory and visualization tutorial. Ensures both are Google Colab compatible with working badges.

Changes:

: - Update intro_tutorial to warn users to ensure up to date version, and make colab compatible #1739, #1744 - Improve new/experimental Solara based visualization to ensure pause button works #1745 - Fix bug in space.py -> get_heading() #1739

2.1.0 (2023-07-22) Youngtown

This release creates mesa.experimental namespace, this solves the issue that PyPI release will not allow git-based install.

Users should read the Mesa 2.0.0 release note (directly below this), as this contains the details about the breaking changes and other major changes that were part of Mesa 2.0 release.

Changes:

: - Creates mesa.experimental namespace #1736 - Fix Ruff lint error #1737 - Update permissions for PyPI #1732

2.0.0 (2023-07-15) Wellton

Special notes

Mesa 2.0 includes:

: - an experimental pure python user interface/ visualization that is also jupyter compatible please see the visualization tutorial_ - an improved datacollector that allows collection by agent type - several breaking changes that provide significant improvements to Mesa.

Breaking Changes:

  • space: change coord_iter to return (content,(x,y)) instead of (content, x,y); this reduces known errors of scheduler to grid mismatch #1566, #1723

  • space: change NetworkGrid get_neighbors to get_neighborhood; improves performance #1542

  • space: raise exception when pos is out of bounds in Grid.get_neighborhood #1524

space: remove deprecations (#1520, #1687, #1688):

:   -   `find_empty()`: convert this to `move_to_empty()`
    -   `num_agents`: removed parameter from `move_to_empty()`
    -   `position_agent()`: convert this to `place_agent`
    -   `neighbor_iter()`: convert this to `iter_neighbors()`

batchrunner: remove deprecations #1627

:   -   `class BatchRunner` and `class BatchRunnerMP`: convert these
        to `batch_run()`
    -   Please see this `batch_run() example`\_ if you would like to
        see an an implementation.

visualization: easier visualization creation #1693

:   -   `UserSettableParameter(['number', 'slider','checkbox', 'choice', 'StaticText'])`:
        convert to `NumberInput` , `Slider`, `CheckBox`, `Choice`,
        `StaticText`
    -   Please see this `visualization example`\_ if you would like
        to see an implementation.

New Features:

  • datacollector: can now handle data collection by agent type #1419, #1702
  • time: allows for model level StageActivation #1709
  • visualization: ChartModule can have dynamically named properties #1685
  • visualization: improved stop server to end visualizations #1646
  • experimental python front end option: integrated the initial prototype of the pure python front end option #1698, #1726

Improvements

  • update HexGrid and create HexSingleGrid and HexMultiGrid #1581

  • correct get_heading for toroidal space #1686

  • update slider to start at 1FPS #1674

  • update links to examples repo due to creation of mesa_examples #1636, #1637

** CI Improvements**

:   -   update Ruff #1724
    -   remove Pipfile and Pipfile.lock #1692
    -   enable Codespell in Jupyter #1695
    -   improve regex for better build #1669, #1671
    -   exclude notebooks form linter #1670
    -   updated pip for zsh #1644
    -   CLI quality of life improvements #1640

**Docs Improvements**

:   -   update to PyData theme #1699
    -   remove .rst to create simpler build #1363, #1624
    -   use seaborn in tutorials #1718
    -   fix types and errors in docs #1624, #1705, #1706, #1720
    -   improve tutorials #1636, #1637, #1639, #1641, #1647, #1648,
        #1650, #1656, #1658, #1659, #1695, #1697,
    -   add nbsphinx to adv_tutorial #1694
    -   replace `const chart` for `var chart` in advanced tutorial
        #1679
  • update LICENSE to 2023 #1683

1.2.1 (2023-03-18)

This release fixes projectmesa#1606, where mesa startproject doesn't work.

Changes:

  • fix: Include cookiecutter folders in install content #1611
  • Fix Ruff errors and pin Ruff version #1609
  • datacollector: Add warning when returning empty dataframe with no reporters defined #1614

1.2.0 (2023-03-09) Taylor

Special notes

New features:

  • Implement radius for NetworkGrid.get_neighbors #1564

Some highlights for the perf improvements:

  • Use getattr for attribute strings in model data collection #1590 this is a 2x speedup over the relevant line
  • Faster is_integer function for common cases #1597 is for 1.3x speedup for grid access (grid[x, y])
  • Refactor iter/get_cell_list_contents methods #1570 at least 1.3x speedup for iter/get_cell_list_contents
  • Evaluate empties set more lazily #1546 (comment) ~1.3x speedup for place_agent, remove_agent, and move_agent

Improvements

  • ci: Add testing on Python 3.11 #1519

  • Remove auto-update GH Actions for Pipfile.lock #1558

ruff

:   -   ruff: Add isort #1594
    -   ci: Replace flake8 with Ruff #1587
    -   ruff: Add more rules based on Zulip\'s config #1596

  • perf: faster is_integer function for common cases #1597

  • Remove _reporter_decorator #1591

  • Change index at DataFrame creation in get_agent_vars_dataframe #1586

  • Make Grid class private #1575

  • Make the internal grid and empties_built in Grid class private #1568

  • Simplify code in ContinuousSpace #1536

  • Improve docstrings of ContinuousSpace #1535

  • Simplify accept_tuple_argument decorator in space.py #1531

  • Enhance schedulers to support intra-step removal of agents #1523

  • perf: Refactor iter_cell_list_contents Performance #1527

  • Replace two loops with dictionary comprehension, list- with generator comprehension #1458

  • Make MultiGrid.place_agent faster #1508

  • Update space module-level docstring summary #1518

  • Update NetworkGrid.__init__ docstring #1514

  • Deprecate SingleGrid.position_agent #1512

  • Make swap_pos part of Grid instead of SingleGrid #1507

  • Refactor NetworkGrid docstrings and iter/get_cell_list_contents #1498

  • Hexgrid: use get_neighborhood in iter_neighbors #1504

  • Auto update year for copyright in docs #1503

  • Refactor Grid.move_to_empty #1482

  • Put "Mesa" instead of "it" in README #1490

  • Batchrunner: Remove unnecessary dict transformation, .keys() in len() #1460

  • Add Dependabot configuration for GitHub Actions update check #1480

  • Use list transformation only when shuffled is True #1478

  • Implement swap_pos #1474

  • Clean up DataCollector #1475

Fixes

  • Update resources in README #1605

  • Fix accident from projectmesa#1488 #1489

  • pre-commit autoupdate #1598, #1576, #1548, #1494

  • Fix docstring of DataCollector #1592

  • Update Pipfile.lock (dependencies) #1495 #1487

build(deps):

:   -   build(deps): bump codecov/codecov-action from 2 to 3
        dependencies Pull requests that update a dependency file
        #1486
    -   build(deps): bump actions/upload-artifact from 2 to 3
        dependencies Pull requests that update a dependency file
        #1485
    -   build(deps): bump peter-evans/create-pull-request from 3 to
        4 dependencies Pull requests that update a dependency file
        #1484
    -   build(deps): bump actions/setup-python from 3 to 4
        dependencies Pull requests that update a dependency file
        #1483

  • Establish reproducibility for NetworkGrid.get_neighbors when radius > 1 #1569

  • Format js code #1554

  • Add some missing const declarations #1549

  • fix tutorial url in examples #1538

  • Update cookiecutter to flat import style. #1525

  • Fix bug in Grid.get_neighborhood #1517

  • Revert changes of #1478 and #1456 #1516

  • Fix return types of some NetworkGrid methods #1505

  • Update year for copyright #1501

  • Add default_value function to NetworkGrid #1497

  • Remove extraneous spaces from docstrings in modules 2 #1496

  • Remove extraneous spaces from docstrings in modules #1493

  • SingleGrid: Remove extraneous attribute declaration (empties) #1491

1.1.1 (2022-10-21)

This release fixes projectmesa#1461 where custom user-specified portrayal images don't load in the visualization server.

1.1.0 (2022-10-10) Safford

Special notes

  • Perf: ContinuousSpace: speed-up add/remove agents #1376. This is a ~6x performance improvement for add/remove.
  • fix: time: Recompute agent_keys between stages #1391. This is a correctness fix for SimultaneousActivation and StagedActivation when agents are being removed during simulation.
  • ModularServer: Always set model.running = True on reset #1399. With this change, specifying self.running = True in your model __init__ is now optional. Mesa's visualization server will automatically sets it to True in the beginning of a simulation.
  • feat: Allow user-specified local dir to be served by Tornado #1435. This simplifies the usage of ModularServer in Mesa-Geo.
  • Allow batch_run to take arbitrary parameters #1413. With this change, you can finally use any arbitrary Python objects as batch_run parameters, where previously they are restricted to hashable objects only.
  • Prevent seed and random from being shared between instances #1439. With this fix, a model instance has their own isolated RNG.

Improvements

CI Updates

:   -   ci: Cancel previous obsolete runs #1378
    -   ci: update black to prevent click error #1382
    -   Add \"falsy\" to .codespellignore #1412
    -   Upgrade pre-commit CI (with pyupgrade and syntax checks)
        #1422

Tests

:   -   test: RandomActivationByType: Test adding agents with
        duplicate ID #1392

Dependency updates

:   -   Update Pipfile.lock (dependencies) #1398
    -   Update Pipfile.lock (dependencies) #1408
    -   Update Pipfile.lock (dependencies) #1434

Docs

:   -   docs: Add Tim Pope\'s guideline for proper Git commit msg
        #1379
    -   readme: Improve the pip install for Git repo instruction
        #1416
    -   Docs: Remove trailing whitespaces #1421
    -   Fixes #1423 - fixes build badge in docs #1424

Refactors

:   -   refactor: Apply pyupgrade \--py37-plus #1429
    -   refactor ModularServer (moving code into \_\_init\_\_) #1403

  • Perf: ContinuousSpace: speed-up add/remove agents #1376

  • Remove monospace formatting for hyperlinks #1388

  • ModularServer: Always set model.running = True on reset #1399

  • Allow batch_run to take arbitrary parameters #1413

  • ModularServer: Put new optional arg port last #1432

  • feat: Allow user-specified local dir to be served by Tornado #1435

  • Improve and measure speed of clamp function #1440

Fixes

  • Fix stray " in modular_template.html #1380
  • Fix zoom on network visualisation #1381
  • Fix broken monospace links #1387
  • fix: Ensure agent id is unique in RandomActivationByType.add #1386
  • fix: time: Recompute agent_keys between stages #1391
  • Fix batchrunner progress bar #1395
  • Fix stray " in visualisation dropdown labels #1409
  • space: Fix type error for Python < 3.9 #1430
  • Prevent seed and random from being shared between instances #1439

1.0.0 (2022-07-06) Quartzsite

Special notes

  • BREAKING: Rename mesa.visualizations.TextVisualization.TextElement to ASCIIElement
  • POTENTIALLY BREAKING: Default batch_run to 1 CPU #1300
  • Simplified namespace implements - see Improvements section.

Improvements

Implement simplified namespace

:   -   docs: simplified namespace tutorial update #1361
    -   examples: Convert shape_example, sugarscape_cg,
        virus_on_network, wolf_sheep to simple namespace #1339
    -   Convert hex_snowflake, pd_grid, schelling to simple
        namespace; \[BREAKING\] Remove class name collision #1333
    -   examples: Convert color_patches, conways_game_of_life,
        epstein_civil_violence, forest_fire to simple namespace
        #1331
    -   Examples: Convert boltzmann_wealth_model_network and chart
        to simple namespace #1322
    -   examples: Convert boid_flockers, boltzmann_wealth_model to
        simple namespace #1321
    -   examples: Convert bank_reserves to simple namespace #1317
    -   add batch_run to simple namespace #1316
    -   Implement simpler Mesa namespace #1294

mypy

:   -   mypy: Use \"\|\" operator instead of Union/Optional #1345
    -   mypy: Improve space.py annotation, part 2 #1219
    -   mypy: Improve annotations #1212

Userparam class updates

:   -   feat: Implement NumberInput UserParam class #1343

    -   feat: Implement StaticText UserParam #1342

    -   feat: Implement Choice UserParam class #1338

    -   feat: Implement Checkbox UserParam class #1332

    -

        feat: Implement Slider UserParam class #1272

        :   -   examples: Convert to using Slider UserParam class
                #1340

Front-end updates

:   -   frontend: Add alignment options to agent portrayals in
        CanvasGridVisualization #1349

    -   frontend: Update Bootstrap 4.6.1 -\> 5.1.3 #1325

    -   ChartModule.js: Use more semantic HTML element creation
        method #1319

    -   Issue #1232; Replaced usage of var to const/let in some
        files #1248

    -   \[Issue 1232\] Refactor NetworkModuleSigma PieChartModule
        TextModule JS #1246

    -   js: Update D3 from 4.13.0 to 7.4.3 #1270

    -   support package and local css includes #1283

    -   Upgrade to Bootstrap 4! #1282

    -   refactor: update var to const/let in InteractionHandler.js
        #1273

    -   Change remaining vendored JS dependencies to be downloaded
        during install #1268

    -   Download jQuery and D3 during install #1260

    -   CSS support for custom visualization element #1267

    -   style: prettify js files #1266

    -   refactor: Change var to const/let for remaining js files
        #1265

    -   Remove NetworkModule_sigma and its dependencies #1262

    -   js: Download bootstrap-slider during install #1257

    -   js deps: Move Bootstrap to be inside external folder #1236

    -   Apply prettier to NetworkModule_d3.js #1225

    -   js: Download Bootstrap on-the-fly during install instead
        #1220

    -   Install JS dependencies using Fanstatic #1195

    -

        JQuery updates

        :   -   examples: Remove all usage of jQuery #1356
            -   Remove jQuery dependency completely #1355
            -   refactor: frontend: Remove remaining usage of jQuery
                #1351
            -   refactor: frontend: Remove usage of jQuery for most
                of the JS code #1348
            -   refactor: frontend: Remove jQuery usage in
                CanvasHexModule.js & CanvasModule.js #1347
            -   refactor: frontend: Remove jQuery usage in
                BarChartModule.js #1326
            -   visualization: Specify tooltip without jQuery #1308

CI Updates

:   -   ci: Ensure wheel is install before pip install step #1312
    -   Fix contributing (increasing black version) #1303
    -   ci: Disable PyPy for now #1254
    -   CI: Update checkout, setup-python and cache actions to v3
        #1217
    -   CI: Split off codespell job, don\'t run build on doc changes
        #1170
    -   ci: Add 6 min timeout for the test jobs #1194
    -   CI: test flake: batch runner sometimes takes 6 hours then
        gets killed by GitHub Actions #1166
    -   ci: Enable cache for all Python versions 🇺🇦 #1177
    -   CI: Create Action to publish to PyPI on release #1169
    -   CI: Python 3.6 should be removed because it has reached EOL
        #1165
    -   Update Black formatting (no spaces for power operator) #1160
    -   Improve code quality with static analysis #1328
    -   CI test: Increase timeout to 10 minutes #1250

Dependency updates

:   -   build(deps): bump cookiecutter from 2.1.0 to 2.1.1
        dependencies #1360
    -   Update Pipfile.lock (dependencies) #1374, #1350, #1301,
        #1224, #1203, #1135 by github-actions bot
    -   Migrate D3 from v4 to v7 #1088

Other Improvements

:   -   feat: Implement auto-conversion of function to TextElement
        #1346
    -   Readme: Add Matrix badge and description #1164
    -   examples: Convert nodes to list when drawing random
        sample#1330
    -   examples: Use nicer color for bank_reserves #1324
    -   examples: Use nicer color for chart #1323
    -   model: Implement initialize_data_collector #1287
    -   CONTRIBUTING: Add instruction to enable git pull autorebase
        #1298
    -   Improve MANIFEST.in #1281
    -   refactor: Merge \_remove_agent into remove_agent #1245
    -   examples: Remove usage of internal method \_remove_agent
        #1241
    -   refactor: Make \_place_agent args consistent with
        place_agent #1240
    -   Redirect user to GH discussions for seeking help #1237
    -   setup.py: Update setup classifiers and add python_requires
        for Python\>=3.7 #1215
    -   The tutorial.rst doesn\'t mention that the Pandas DataFrame
        output can be in CSV #1148
    -   Deprecate neighbor_iter in favor of iter_neighbors #1184
    -   Add snippet about using numpy\'s random #1204
    -   docs: make windows multiprocessing code appear #1201
    -   Capitalize CSV whenever applicable #1200
    -   update intro tutorial for pandas and CSV and batch_run and
        windows #1196
    -   docker-compose.yml: Make it consistent with Dockerfile #1197
    -   Improve Dockerfile #1193
    -   update to include Matrix and GitHub discussion links #1179
    -   Update docs to remove old discussion forums #1171
    -   Add \"Grass\" curve to wolf_sheep example chart #1178
    -   feat: Implement random activation by type #1162

Fixes

  • Git tags out of sync with conda and PyPi (0.8.8 and 0.8.9 missing on git) #1076

  • fix: Remove mesa.visualization.Number #1352

  • CI: the "install dependencies" step is slow #1163

Readme related

:   -   readme: Clarify/Update Docker instruction #1222, #1214
    -   Readme: Fix links to docs #1205

  • Add mesa/visualization/templates/js/external to gitignore #1320

  • fix: sugarscape_cg: Use better way to check if a cell is occupied by SsAgent #1313

  • fix double multiply of iterations in singleprocess #1310

  • pre-commit: fix required python version, correct example commit messa... #1302

  • fix: Make bank_reserves batch_run example work #1293

  • Fixes #498. Replaces canvas_width with grid_rows to fill out color patches 3 - Accept easy task!!! #989

  • update pre-commit to include jupyter; fix warning #1190

  • fix: Grid.__getitem__: Handle Numpy integers #1181

  • fix: Make argument order in example models consistent #1176

  • issue template: Linkify discussions url #1239

  • batch_run: Do not iterate values when it is a single string #1289

  • examples: Clarify install instruction in wolf_sheep #1275

  • test: Disable batchrunnerMP (CI: test flake: batch runner sometimes takes 6 hours then gets killed by GitHub Actions #1166) #1256

  • examples: correcting comment in examples/pd_grid/pd_grid/agent.py #1247

  • space: Clarify the return object of get_cell_list_contents #1242

  • width and height were changed up #1149

  • fix typo in best-practices.rst #1368

  • fix: examples: Make space x, y order consistent #1366

0.9.0 (2022-01-31) Page

Improvements

  • Update number_processes and associated docs #1141

  • [PERF] Improve move_to_empty performance #1116

  • Adding logic to check whether there is agent data #1115

  • Convert all text strings to f-strings #1099

  • Format Python and Jupyter Notebook files with Black #1078

  • README: Add info on how to cite Mesa #1046

  • Re-Implementation of BatchRunner #924

CI Related

:   -   CI: Add workflow to update Pipfile.lock every month #1018
    -   CI: Lint typos with Codespell #1098
    -   CI: Only run Codecov on Ubuntu jobs and update to v2 #1083
    -   CI: Maintenance: Update to Python 3.10, split of lint jobs
        #1074

Dependency updates

:   -   Updates to Pipfile.lock (dependencies) #1114, #1086, #1080
    -   Update Pipfile to use Python 3.9 #1075
    -   Update Chart.js to 3.6.1 (v3) #1087
    -   Update Chart.js to version 2.9.4 #1084
    -   Pyupgrade 3.6: Update syntax with Python 3.6+ features #1105
    -   Bump urllib3 from 1.26.2 to 1.26.5 #1043
    -   Update packages.rst #1068

Docs

:   -   Update docs/README.md #1118
    -   Update number_processes and associated docs #1141
    -   Update section \'Batch Run\' of introductory tutorial #1119
    -   Readme: Add command to install specific branch #1111
    -   Docs: Add back some comments in space.py #1091
    -   Docs: Remove trailing white spaces #1106
    -   Update intro_tutorial.rst #1097, #1095
    -   Tweaking and improving the documentation #1072

Fixes

  • Rename i_steps -> data_collection_period and add docstring #1120

  • bank_reserves: Say that the commented out legacy code is for comparison #1110

  • Fix broken image on PyPI #1071

Docs

:   -   Fix numbering typos in docs/README.md #1117
    -   Readme: Fix command for installing custom branch on fork
        #1144
    -   Docs: space.py: Fix single case of neighbor spelled as
        neighbour #1090

0.8.9 (2020-05-24) Oro Valley

Note: Master branch was renamed to Main on 03/13/2021

Improvements

Master to Main change:

:   -   Docs/examples: Update links to use main instead of master as
        branch #1012
    -   CI: Run on pushed to main and release branches #1011

Github Actions

:   -   GitHub Actions: run black only on ubuntu 3.8 #996
    -   GA: Only run CI when pushed to master #974
    -   GA: Add pypy3 #972
    -   rename github action to \"build\", remove redundant flake8
        check #971
    -   GA: Run on Windows and macOS #970
    -   Add GitHub Action for continuous integration testing #966

  • [PERF] Add neighborhood cache to grids and improve iter_cell_list_contents #823

  • forest_fire: Remove unnecessary code #981

  • Migrate away from type comments #984

  • Update License #985

  • Public remove_agent function for NetworkGrid #1001

  • Date update to release #962

  • Advanced indexing of grid #820

Fixes

  • Correct spelling #999
  • Update Pipfile.lock #983
  • Fix order of variable_params in model and agent vars data frames #979
  • Fix asyncio on windows with python 3.6 #973

0.8.8 (2020-11-27) Nogales

Note: This is the last version to support Python 3.5.

Improvements

  • Added pre-commit to automatically maintain a standard formatting with black #732

Fixes

  • MultiGrid: Set to using list for cell content #783

Docs

:   -   Fixed broken link to templates list in advanced tutorial.
        #833
    -   Fixed image links in rst #838
    -   Cleaned html to attempt correct build #839
    -   Fixed links on Boltzmann model #843
    -   Documentation update - batchrunner & data collector #870
    -   Deleted readthedocs.yml #946
    -   Doc builds #837, #840, #844, #941, #942

  • Fixed bulleted list in contribution read me #836

  • Updated test_examples.py, changed unused generator expression to actually run the models. #829

  • Fixed #827 issue (example Epstein Civil Violence Jupyter Notebook typos) #828

  • Eliminated Ipython3 references #841

  • Fixed cookie cutter Fixes #850. #853

  • Removed relative imports -- fix #855. #863

  • Updated pytest requirement to fix issues on travis #864

  • Made linux compatible - travis #886

  • Fixed python 3.5 fails, boid failure #889, #898

  • Travis: Removed python 3.5 #899

  • Fixed example testing issues close multiprocess pools #890

  • Used ordered dict to make compatible with python 3.5 #892

  • Increased number of test to fix codecov patch #916

  • Fixed for #919, adding an exception for duplicate ids. #920

Batchrunner

:   -   Batch runner redux #917
    -   Fixed empty/None `variable_parameters` argument to
        BatchRunner (#861) #862
    -   Added ordereddict to BatchrunerMP for python 3.5 #893
    -   Fixed python 3.5 fails bathrunnerMP (multiple tries) #897,
        #896, #895
    -   Batchrunner_redux fixes #928

  • Fixed variables names, mp function locations, datacollector #933

  • ModularServer updated: Fix EventLoop and changes to default port #936

  • Ran black 20.8b1, which formats docstrings #951

0.8.7 (2020-05-05) Mammoth

Improvements

  • Enable BatchRunner to run specified set of parameter combinations #651 (#607)

  • Restructured runcontrol.js #661

  • Add pipenv support for mesa #678

  • Increase test coverage and change to codecov #692

  • Updates Travis to explicitly set the dist to be Xenial #699

  • time: Remove resolved TODO on random seed of random scheduler #708

  • hex_snowflake: Update description to be more informative #712

  • Added Coverall to Codecov in Contributing file #734

  • Makes opening the browser optional when launching the server #755 #754

  • NetworkGrid: Update to networkx 2.4 API #763

  • Apply black to mesa/ directory #775

  • Updated travis to 3.8 and updated gitignore #777

  • Add information (to docstring) on image as agent portrayal shape #791

  • Change grid empties from list to set #649 (improves speed)

Adding mypy annotation

:   -   space: Add type annotation to Grid class #779
    -   add Mypy annotation to time, agent, and model #792
    -   space: Add mypy annotation to the remaining
        methods/functions #796

Docs related

:   -   Bulk merge of docs from \'docs\' to \'master\' #684

    -

        Created useful snippets code section in the docs #668 #669

        :   -   Updating index.rst #672
            -   Clarify runserver snippet in index.rst #682

    -   Add documentation for feature (pipenv) added in #678 #683

    -

        Add docs for BatchRunner to support Variable and Fixed Parameter Contribution #679 #683

        :   -   Resources #651 in docs branch #691. This preps for
                #683 to be merged.

    -   intro tutorial: Clarify a function that is not defined in
        the class #705

    -   Updates formatting the readme Docs markdown #737

Examples related

:   -   Schelling: Separate text-only viz into run_ascii.py #706
    -   examples/Readme.md: Update description to be consistent with
        the folder names #707

Fixes

  • Fixes link to update code coverage module - Updates Removing last link to coveralls and replacing to codecoverage #748

  • Fixes D3 Network Visualization to update (rather than overwrite) #765 #767

  • Fix parameter order in initializing SingleGrid object #770 #769

  • Updating pipenv link #773

  • Fixed pip install from github by specifying egg #802

Compatibility fixes

:   -   Fixes VisualizationServer to be compatible with recent
        versions of Tornado #655
    -   Fixes #749 networkx incompatibility #750

Fixing typos

:   -   Fixes documentation typos in example code #695 #696
    -   Fixes typo in ModularServer\'s last parameter #711
    -   Fixed typo in BarChartModule line 100 #747
    -   Fix typo in documentation #809

Doc fixes (not relating to typos)

:   -   Update tutorial to point to correct repo location #671 #670
    -   Updating sphinx and reverting issues #674 #675 #677 #681
    -   Fixes code blocks that weren\'t showing up in the tutorial
        #686
    -   Remove figure from advanced tutorial showing the empty
        visualization #729
    -   Removes git clone from tutorial - Update intro_tutorial.rst
        #730
    -   Fixes citation links in docs tutorial section #736
    -   Fix histogram in advanced tutorial #794 #610
    -   Fixes Advanced Tutorial #elements #804 #803

Fixes to examples

:   -   Fixing test_random_walk bug - wolf sheep. #821
    -   Fixes shape_example server launch #762 #756
    -   Fixing broken table in pd_grid example #824

0.8.6 (2019-05-02) Lake Havasu City

Improvements

  • add docker-compose + Dockerfile support #593
  • install: Remove jupyter requirement #614
  • Add Bar and Pie Chart visualization #594 #490
  • Make models pickleable #582

Fixes

  • Year update. Happy New Year! #613
  • Fixed problem with grid and chart visualization javascript #612 #615
  • removed extra" .random" on line 178. #654
  • updated requirement for networkx #644 #646
  • Fix VisualizationServer to be compatible with recent versions of Tornado #655

0.8.5 (2018-11-26) Kearny

Improvements

  • Added mouse interactionHandler to close #457, fixed hexgrid drawLines #465
  • Run examples as part of the tests #529, #564
  • Add a github issue template. #560
  • Changes nose to pytest #561
  • Update and clean up cookiecutter layout #563
  • Updating setup to move requirements to setup.py. #566
  • Fixes #570 removed and updated stale comments in space.py #571
  • Adding model random number generator with __new__ #572
  • Faster agent attribute collection #576
  • Update install command to be edible #578
  • Adding read the docs yml. #579
  • agents can be removed and added during Scheduler.step() #584
  • Adding a description to bank_reserves. #587
  • F8 cleanup #600

Fixes

  • Fixes #543 (User Settable Parameters fail to work for non-string datatype #543) #544
  • Adding missing requirements files to examples. #550
  • Fixes issue #548, flockers visualization not showing up #548
  • updated BatchRunner (throwing error when passing in agent reporters) #556
  • Removing version numbers and fixing flake8 issues. #562
  • Fix issue #548 (Flockers visualization is not working) #566
  • Fixes code formatting in readmes. #577
  • Batchrunner.fix (BatchRunner's "variable parameters" is not strictly optional) #596

0.8.4 (2018-06-17) Jerome

Improvements

  • Mesa Packages docs created (#464, #480, #484, #503, #504)
  • Change size and tooltip text of nodes in D3 network visualization #468
  • Multiprocessing BatchRunner with pathos #506
  • Schedule.agent.dict - Implement tracking the agents in the scheduler via OrderedDict #510
  • Use click and add mesa run #522
  • Add a code of conduct #530

Fixes

  • iter_neighborhood() now gives correct neighborhoods for both von Neumann and Moore #459
  • fix typo #461
  • Flockers update & subsequent "F" versus "f" fix on Unix/Mac - #477, #518, #525, #500
  • Fixing date on release. #453
  • Batchrunner fixes: properly initialize models with correct parameters during subsequent runs. #486
  • Tornado Version Bug Fixes (upgrading #489, downgrading #497, adding to setup.py #527)
  • fix minor flake8 issues #519
  • align required dependencies between setup.py and requirements.txt #523, #528, #535
  • Fixes #499 grid size issue. #539

0.8.3 (2018-01-14) Hayden

Improvements

  • Datacollector fix #445
  • A first network grid model with visualization, using NetworkX and sigma.js #388
  • Cache pip packages for Travis setup #427
  • Remove localhost hardcoding + allow secure sockets #421
  • Update Chart.js to version 2.7.1 #401
  • Bank reserves example #432
  • Extended Grid to support hexagonal grids #409

Fixes

  • Faster ContinuousSpace neighbor search #439
  • Updating license year to 2018 #450
  • Updating language on license in contributing file #446
  • Updating license year to 2018 #450
  • Removed mutable defaults from DataCollector constructor #434
  • [BUGFIX] Torus adjustment in Grid class #429
  • Batchrunfixedparameters #423
  • [BUGFIX] Fix sidebar visibility in Edge #436
  • Updating Travis svg to target #master, not branches. #343
  • Email list language updates and link updates #399
  • Fix math problems in flockers; use numpy in space #378
  • Only start tornado ioloop if necessary #339
  • ContinuousSpace: Fix get_distance calculation on toroidal boundary condition #430

0.8.2 (2017-11-01) Gila Bend

Improvements

  • Split parameter_values into fixed & variable parameters in batchrunner #393

Fixes

  • Updating License year to 2017 -- very minor update #391

  • Flockers: fix param naming #398

  • Remove unused class parameters. #400

  • [hotfix!] Disable e2e viz test for now. #414

Fixing bug in release process. \[6a8ecb6\]

:   -   See <https://github.com/pypa/pypi-legacy/issues/670>.

0.8.1 (2017-07-03) Flagstaff (PyCon Sprints & then some)

Improvements

  • Bootstrap UI starter #383

  • Add Sugarscape Constant Growback example #385

  • Add best-practices document and describe models. #371

Refactored & model standards related:

:   -   Prisoner\'s Dilemma refactor to meet new model standard
        format. #377
    -   refactored boltzmann wealth model to new layout #376
    -   Update tutorial to follow new model standards #370
    -   Moving wolf sheep pngs to sub-folder for better organization
        #372
    -   Add best-practices document and describe models. #371

  • Modified loop over agents in schedule step method #356

  • Added function to use local images as shapes in GridDraw #355

Fixes

  • Fix math problems in flockers; use numpy in space #378
  • Seed both global random number generators #373, #368
  • Dictionary parameters fix #309
  • Downgrade setuptools to fix #353
  • Minor forest fire fix #338, #346
  • Allow fixed seed for replication #107
  • Fix tutorial and example readme for port change 8b57aa

0.8.0 (2017-01-29) - Edgar

Improvements

  • Updating contribution file to prevent future travis breaks #336
  • Updating Travis svg to target #master, not branches. #343
  • implement "end" message in visualization #346
  • Move empty-cell functions to baseclass Grid #349

Fixes

  • Only start tornado ioloop if necessary #339
  • fix boundaries of ContinousSpace #345

0.7.8.1 (2016-11-02) Duncan

Improvements

  • Fixes #324 -- renames all examples to be the pythonic format of naming #328
  • Changing to port 8521, fixes #320. #321
  • Opens a browser window when launching the server #323
  • Ticket #314 - added progress bar to BatchRunner #316
  • Auto update year for copyright. #329

Fixes

  • Minor bug fixes - Update ForestFire example notebook to new API, and rename Basic to Shape Example. #318
  • On-demand model stepping rather than an endless buffer #310
  • Updating contribution to prevent future travis breaks #330

0.7.7 (2016-08-18)

Improvements

  • Fixes - variable name heading0/1 in ArrowHead shape is not intuitive. #295 #301
  • Fixes - ArrowHead shape is not reflecting in the docs of api #300 #301
  • Fixes - Documentation is not reflecting latest changes wrt width-height argument order in Grid() #296 #301

0.7.6 (2016-08-13)

Theme: Scipy Sprints 2016 ( '-')人(ﾟ_ﾟ ) & Then some.

Feature adds

  • Add new shapes & direction indication in CanvasGrid #285
  • Provides support for text overlay on Circle and Rectangle shapes. #265

Improvements

  • Fixes Parameters of CanvasGrid(): row, col, height, width inverted #285
  • Fixes 'coordinates on grid are used inconsistently throughout the code' #285
  • Moves Agent and Model class outside of __init__.py #285
  • Minor pep updates to boltzmann. #269
  • Fix link to intro tutorial. #267
  • Updating template text visualization/ModularVisualization.md #273
  • Update intro_notebook and documents to include self.running = True in MoneyModel #275
  • Update .rst file location to make sure ReadTheDocs works correctly #276
  • Remove Mock code causing recursion and preventing build of docs. #281
  • MultiGrid docstring missing methods #282
  • No Docstring for model.grid.get_cell_list_contents #282
  • Refactor forest fire example #223 #288
  • Updating kernel version on forest fire model. #290
  • Making examples pep complaint. fixes #270 #291
  • Fixed pep8 examples and #292 #294
  • Fixes #283 - Fixes formatting on viz readme #299
  • Have Agent use self.model instead of passing it around #297

0.7.5 (2016-06-20)

Pre-sprints

  • Update of tutorial files and docs #176, #172
  • Adds np.int64() functions around some variables to get rid error caused by numpy update #188
  • Made examples Readme.md more readable #189

From PyCon Sprints

  • Updating model example readmes #207
  • Added nose to requirements #208
  • Updated link on style google style guide #209
  • Reset visualization when websocket connection is opened #210
  • Remove unused scipy dependency #211
  • Introduce a requirements.txt for the tutorial. #212
  • Remove references to running in tutorial #213
  • Simplify travis.yml; add python versions #215
  • Update Flocker Readme.md #216
  • Syntax error in .rst was swallowing a code block #217
  • Fixup HistogramModule in the tutorial. #218
  • add more test coverage to time #221
  • add a requirements.txt for WolfSheep. #222
  • add a requirements.txt for Schelling. #224
  • Refactor color patches example #227
  • Ignored _build sphinx docs still in repo #228
  • Intro Tut completely in ipynb #230
  • pass optional port parameter to ModularServer.launch #231
  • open vis immediately when running color patches #232
  • Adds .DS_store to .gitignore #237
  • Documentation Update #240
  • Small fix for reading links #241
  • Test batchrunner #243
  • clean up TextVisualization #245
  • Documentation Update #250
  • Update Game of Life example to new format #253
  • Update Flockers example to new format #254
  • Update Epstein model to new layout #255
  • Subclassing object is unnecessary in Python 3 #258

Post PyCon Sprints

  • Adds a copy of jquery directly into the code. #261

0.7.0 (2016-03-06)

  • #184 Adding terminal echo for server launch to signal person running the model
  • #183 Adding Conway's Game of Life simulation to the examples.

0.6.9 (2016-02-16)

  • #170 Adding multi-stage activation
  • #169 Wolf-Sheep Cleanup
  • Updates requirements to latest libraries

0.6.7 (2015-07-11)

Improvements

  • Allow cell_list_content methods in Grids to accept single tuples in addition to lists

0.6.6 (2015-07-11)

Theme: Scipy Sprints ( '-')人(ﾟ_ﾟ )

Improvements

  • Standardizes the arguments passed to spatial functions to only tuples, not separate x and y coordinates. (Breaks backwards compatibility)

0.6.5.1 (2015-07-11) ++++++++++++++++++

Theme: Scipy Sprints ( '-')人(ﾟ_ﾟ )

Improvements

  • Adding version, license, copyright, title to __init__.py
  • Auto updating version in setup.py

Fixes

  • Updating MANIFEST.in to include visualization templates that were missing.

0.6.5 (2015-07-11)

Theme: Scipy Sprints ( '-')人(ﾟ_ﾟ )

Edits

  • Additions to tutorial doc
  • Minor edits to README & Intro
  • Minor edits / clean up to setup.py
  • Removing .ipynb_checkpoints
  • Removing out-of-date planning documentation.

Fixes

  • Use setuptools' find_packages function to get the list of packages to install, fixes #141

Improvements

  • Use package_data for include the web files
  • Use a MANIFEST.in file to include the LICENSE file in source distributions
  • Using conda on Travis allows much faster builds and test runs

0.6.2 (2015-07-09)

  • Improvement: Adding continuous space.

  • Improvement: Adding a simultaneous activation scheduler.

New models:

:   -   Flockers
    -   Spatial Demographic Prisoner\'s Dilemma (PD_Grid)

0.6.1 (2015-06-27)

  • Fixes: Order of operations reversed: agent is removed first and then it is placed.
  • Improvement: LICENSE_ was updates from MIT to Apache 2.0.

0.6.0 (2015-06-21)

  • Improvement: Add modular server feature, which breaks up a model into a .py file and a .js file. This breaks backwards compatibility.

Pre 0.6.0

Code that is pre-0.6.0 is very unstable.

Our initial release was 0.5.0 (2014-11).

It included code for placing agents on a grid; a data collector and batch runner; and a front-end visualization using HTML 5 and JavaScript.

General

  • Objects create -- Agent, Time, Space
  • Project moved to Python 3
  • Tornado server setup

Front-end

  • Front-end grid implemented
  • ASCII visualization implemented

Examples models

  • Forest Fire
  • Schelling
  • Wolf-Sheep Predation

0.1.0 (2014-09-19)

  • A conversation
  • Birth