Am I reading this correctly?: you were hired at MS with only cursory python knowledge? I’m very jealous and thinking more and more about going into IT after I leave uni for engineering (not software engineering). I know python well, along with a few other things I’ve picked up over the years (emacs/elisp, vim/vimscript, LaTeX formatting, JS, Common Lisp, APL, bash scripting, mathematica and matlab etc.). Would this be enough to land a position like yours? I am lacking in the AI area, but I can begin that on my weekends.
She probably did an interview focused on data analysis, statistics and experimentation. Her python skills probably weren't that relevant, as long as she can use libraries.