[pen2l]

Is that Jupyter?

I'm kind of a python/ML newb, am curious to know: when doing ML stuff, do you guys usually do it interactively with Jupyter? The whole process of preprocessing, graphing, reducing dimensions, ML... do you prefer to do it one-by-one in Jupyter or Jupyter-like envrionment vs. just make one big python script? Just curious about common workflows.

[minimaxir]

Correct. For common workflows, see my post comparing Jupyter Notebooks and R Notebooks: http://minimaxir.com/2017/06/r-notebooks/

Never do data analysis in "one big Python script" if you value your sanity.