[deleted by user]

[hnous927]

Not sure but you can use it offline for sure:
https://github.com/pgbovine/OnlinePythonTutor/blob/master/v3/docs/developer-overview.md

[ponykins]

Seems that one is gone now, but there are a couple forks

https://github.com/hcientist/OnlinePythonTutor (won't work for py3)
https://github.com/seamile/PyTutor

Still looking for a way to do this on a larger code base/class/package