Hiding code in IPython notebooks on binder

Binder is a really neat tool to put ipython notebooks on the web so anyone else can see them and play with them. All you do is put a link to a repository (most probably github but there are other alternatives ...

However if you upload a code heavy ipython notebook you are greated by something that looks like this: This isn't great for an interactive teaching environment, so how do you hide the the python code but still retain it for those who are curious. There are lots of answers and I tried a few before I found a reasonable result. So here is my best solution, there is a notebooks extension called appmode which works really well as you can go from this

to this

however it requires some mucking about with your binder urls and converting to a conda based code flow. So... 1. add an environment.yml to the root of your github, it should contain trhe packages you use plus appmode, this will download files from conda I have

1 2 3 4 5 6 7 8

channels: - conda-forge dependencies: - appmode - numpy - scipy - ipywidgets - matplotlib

2. Then change the format of your binder badge, I started with

1	[](https://mybinder.org/v2/gh/varioustoxins/fft_demos/HEAD)

and had to alter it to

1	[](https://mybinder.org/v2/gh/varioustoxins/fft_demos/HEAD?urlpath=apps%2Ffft_window.ipynb)

note how the end of the url becomes HEAD?urlpath=apps%2Ffft_window.ipynb rather than head HEAD and apps%2F is inserted between the urlpath= and the path to of your ipython notebook (fft_window.ipynb in my case) Thats it, the notebook I used this on provides interactive NMR processing demos checkit out on github. More of that another time when its finished...