Brian 2 A clock-driven simulator for spiking neural networks Brian is a free, open source simulator for spiking neural networks. It is written in the Python programming language and is available on almost all platforms. We believe that a simulator should not only save the time of processors, but also the time of scientists. Brian is therefore designed to be easy to learn and use, highly flexible and easily extensible. Documentation for Brian2 can be found at http://brian2.readthedocs.org The code is developed here: https://github.com/brian-team/brian2/ Brian2 is released under the terms of the CeCILL 2.1 license. If you use Brian for your published research, we kindly ask you to cite our article: Stimberg, M, Brette, R, Goodman, DFM. “Brian 2, an Intuitive and Efficient Neural Simulator.” eLife 8 (2019): e47314. doi: 10.7554/eLife.47314.