Internal state is often a problem, look at project like stichfix nodebook, and dataflow kernels, they make things a bit easier by re-executing cells. On of the

Internal state is often a problem, look at project like stichfix nodebook, and dataflow kernels, they make things a bit easier by re-executing cells. On of the issue is you always have internal state as soon as you interact with a data source or sink. If you read/write from a API, then rest is stateful. Your file system is stateful... etc. It's an interesting but hard problem, we'll be happy to have more help with. https://github.com/dataflownb/dfkernel https://github.com/dataflownb/dfkernel https://multithreaded.stitchfix.com/blog/2017/07/26/nodebook/ https://multithreaded.stitchfix.com/blog/2017/07/26/nodebook...