Mesa: Agent-based modeling in Python 3+

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Mesa is an Apache2 licensed agent-based modeling (or ABM) framework in Python.

It allows users to quickly create agent-based models using built-in core components (such as spatial grids and agent schedulers) or customized implementations; visualize them using a browser-based interface; and analyze their results using Python's data analysis tools. Its goal is to be the Python 3-based alternative to NetLogo, Repast, or MASON.

Above: A Mesa implementation of the Schelling segregation model, being visualized in a browser window and analyzed in a Jupyter notebook.

Features

Modular components
Browser-based visualization
Built-in tools for analysis
Example model library

Using Mesa

Getting started quickly:

$ pip install mesa

You can also use pip to install the github version:

$ pip install -e git+https://github.com/projectmesa/mesa

Take a look at the examples folder for sample models demonstrating Mesa features.

For more help on using Mesa, check out the following resources:

Running Mesa in Docker

You can run Mesa in a Docker container in a few ways.

If you are a Mesa developer, first install docker-compose and then run:

$ docker-compose build --pull
...
$ docker-compose up -d dev # start the docker container
$ docker-compose exec dev bash # enter the docker container that has your current version of Mesa installed at /opt/mesa
$ mesa runserver examples/Schelling # or any other example model in examples

The docker-compose file does two important things:

It binds the docker container's port 8521 to your host system's port 8521 so you can interact with the running model as usual by visiting localhost:8521 on your browser
It mounts the mesa root directory (relative to the docker-compose.yml file) into /opt/mesa and runs pip install -e on that directory so your changes to mesa should be reflected in the running container.

If you are a model developer that wants to run Mesa on a model (assuming you are currently in your top-level model directory with the run.py file):

$ docker run --rm -it -p127.0.0.1:8521:8521 -v${PWD}:/code comses/mesa:dev mesa runserver /code

Contributing back to Mesa

If you run into an issue, please file a ticket for us to discuss. If possible, follow up with a pull request.

If you would like to add a feature, please reach out via ticket or the dev email list for discussion. A feature is most likely to be added if you build it!

License

lcdvissc/mesa

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