This is ready for review and comment. Without review, I will merge this after at least 24 hours, no sooner than Fri 26 Apr 02:00 GMT (Thu 25 Apr 21:00 my local).

This is a huge PR in terms of changes, but all of them are individually small and repetitive. I converted legacy nose to pytest with the help of a number of vim macros. But do at least take a look at the many nose-based puns I've been making in commit messages, as well as in the PR title/branch name. Otherwise, like most of my jokes, these will be spoken into the void, only for my own amusement.

But do at least take a look at the many nose-based puns I've been making in commit messages, as well as in the PR title/branch name. Otherwise, like most of my jokes, these will be spoken into the void, only for my own amusement.

Thanks for the heads up, I do appreciate them 😀 Will walk through the PR and see how far I get

Changes should be all addressed! Take a look when you can, @sroet, and mark it green if ready!

Replies to a couple other points:

you sometimes go for assert x and sometimes for assert x is True from assert_equal(x, True), either one is fine by me (while I think assert x is technically the better replacement)

Yeah, I agree. First macro I added was (of course) assert_equal(X, Y) to assert X == Y. Eventually I saw enough of the assert_equal(X, True) that I made a macro to make it into assert X (and assert not X for False). Which one you see depends on how far into the process I was when I hit that file.

I did run a grep -R "nose" ./ on this branch and it only matched a .git object

git ls-files | xargs grep "nose" 😉 I have far too many random untracked files in my OPS directory.... (But that's how I found the random mention in an ipynb).