The environment variable you're thinking of is `PYTHONUNBUFFERED`, not `UNBUFFERED` [0]. If you want a generic solution to this problem, try the `unbuffer` command [1].

For anyone who's interested, I recommend reading Julia Evan's article [2] about this problem and its solutions.

[0]: https://docs.python.org/3/using/cmdline.html#envvar-PYTHONUN...

[1]: https://manpages.ubuntu.com/manpages/noble/man1/unbuffer.1.h...

[2]: https://jvns.ca/blog/2024/11/29/why-pipes-get-stuck-bufferin...

Thanks, I forgot about the PYTHON prefix, fixed it.

On MacOS, can install via homebrew's `expect`: https://apple.stackexchange.com/a/193152/330523

Apparently I knew about this 2.5 years ago as I commented on the accepted answer back then.

The Julia article was a good read. Probably something I run into once a year, but glad to have a better understanding of it.

Julia Evan's article is a great write-up indeed, I'll submit it as a main link.

It's "Julia's article", not "The Julia article".

Update: it is was on here just a month ago actually: https://news.ycombinator.com/item?id=42275033

It's Julia Evans' article, not Julia Evan's.

I don't know if Julia Evan even has an article.

I was taught that the s is omitted after plural nouns, not after nouns ending in s.

Julia Evans's house, but the Evans' house.

FWIW, I'd accept either one. Some names don't take an extra s by convention, like Jesus, but otherwise it seems in practice that names that feel like plurals don't get it. I'd write "Jess's" but "Jenkins'".

(I consider myself a follower of Lynne Truss's, and have deliberately not considered a grammar reference for this answer, as I'm sure this is within the interested reader's ability and shan't spoil these readers' fun.)