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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[2.3.1] - 2024-06-27

Added

  • Updated evaluation-results notebook with the Melting Pot Competition baselines data.

[2.3.0] - 2024-06-27

Added

  • New scenarios, puppets and bots used in the Melting Pot Contest, NeurIPS 2023.

Known issues

  • Two scenarios in the competition were set up wrongly. Tracking issue: #246
    • clean_up_20 is using the wrong (puppet) bot: clean_up__puppet_sanctioning_alternator_nice_0 instead of clean_up__puppet_sanctioning_alternator_0.
    • territory__rooms_6 is identical to territory__rooms_5.

[2.2.2] - 2024-03-20

Fixed

  • Update setup.py to work with earlier setuptools (fixes broken 2.2.1 release).

[2.2.1] - 2024-03-19 [YANKED]

Changed

  • Do not allow orientation = None in Transform objects
  • Improve documentation for territory__*.
  • Improve scenario tags.
  • Move puppeteers testutils to testing dir.
  • remove restriction on chex
  • Update setup.py to work with older versions of setuptools
  • Add dev tools to setup.py
  • Add pytest-xdist as a required plugin.
  • Update pylintrc

Fixed

  • Debug observations break hidden agenda #168
  • Various lint errors

Removed

  • Residual v1 file: reaction_graph_utils.py
  • Remove stale documentation left over from 1.0.

[2.2.0] - 2023-07-25

Changed

  • Make meltingpot pip installable.
  • Support import meltingpot as an alias of import meltingpot.python.
  • Raise minimum Python version to Python 3.10.
  • Install assets as part of pip install .
  • Update Dockerfile and dev tooling (pytest, pyink, pytype, pylint, isort).
  • Update examples to work with v2.
  • Update README.md with new installation details.
  • Migrate from rx to reactivex.

Fixed

  • Remove type annotation for dtype.
  • Use correct roles in play_hidden_agenda.
  • Fix noop that was causing a typing error.
  • Add missing __init__.py files.
  • Set the default orientation to NORTH for objects that have no orientation defined.

Added

  • Evaluation utilities.

[2.1.1] - 2023-02-16

Changed

  • Added COLLECTIVE_RETURN to PERMITTED_OBSERVATIONS.
  • Split install.sh into three scripts.
  • Move from yapf to black.
  • Remove debug observations to speed up environment stepping.

Fixed

  • Add Lua 5.2 compatibility for unpack.

Removed

  • SubstrateWrappers previously needed for the v1 bots.

Added

  • Colab for visualizing evaluation results.
  • Tests for the examples.
  • Mocks of specific substrates and scenarios, for use in testing.
  • Helper for setting world.rgb spec.

[2.1.0] - 2022-12-06

Changed

  • Improve debugging information in SavedModelPolicy.
  • Resample bots at the beginning of scenario episodes.

Fixed

  • Initialize Transform before any other component. #84 #24

Added

  • New substrate "Hidden Agenda" and its scenarios.

[2.0.0] - 2022-11-25

Melting Pot Version 2.0.0 release. See Melting Pot 2.0 Tech Report for detailed information on the new substrates, bots, and scenarios.

Changed

  • Removed all v1 scenarios, bots, and substrates and replaced with new versions.
  • Scenarios now support heterogeneous roles, which must be specified at build time.
  • Various improvements to examples and their documentation.

Added

  • New puppeteers and policies to implement new bots.
  • New utils to handle sprites, colors, and maps.
  • Mocks for use in testing.

[1.0.4] - 2022-08-22

Changed

  • Drop support for Python 3.7 and 3.8.
  • Store saved models on Google Cloud Platform rather than in the Git repo.
  • x2 speed improvement to some substrates
  • Improved install.sh script and installation documentation.
  • Various improvements to examples and their documentation.

Fixed

  • Puppets were sharing state in Scenarios. #70
  • Various issues with RLlib examples.

Added

  • .devcontainer for the project.
  • pettingzoo example.
  • TF1-compatible version of SavedModelPolicy.

[1.0.3] - 2022-03-03

Changed

  • Define is_focal is in scenario configs.
  • Use chex.dataclass for dm-tree compatibility.

Fixed

  • Use correct is_focal settings for team-vs-team games #16.

[1.0.2] - 2022-02-23

Added

  • Substrates and Scenarios now have ReactiveX observables.

Changed

  • Don't add INVENTORY observation to scenarios that don't use it.
  • Various updates to RLlib example.
  • Improved performance of the component system for environments.

Fixed

  • Simulation Speed #7
  • Horizon setting in examples #9
  • Error running example "self_play_train.py" #10
  • build lab2d on m1 chip #13

[1.0.1] - 2021-10-01

Submitted a number of fixes to ensure substrates and scenarios operate as intended. Other changes not expected to have any impact.

Fixed

  • Bots receive incorrect timesteps in Scenario #3
  • Python seed is not forwarded to Lua #4
  • Second episode using same seed as the first #5

[1.0.0] - 2021-07-16

Initial release.