The tutorial consists of a series of Jupyter Notebooks . If you run such a notebook on your own computer, you can interactively change the code in the tutorial and experiment with it – this is the recommended way to get started with Brian. The first link for each tutorial below leads to a non-interactive version of the notebook; use the links under “Notebook files” to get a file that you can run on your computer. You can also copy such a link and paste it at http://nbviewer.jupyter.org – this will get you a nicer (but still non-interactive) rendering than the one you see in our documentation.
For more information about how to use Jupyter Notebooks, see the Jupyter Notebook documentation.