Programming FAQ: discourage using `importlib.reload` outside of the REPL

[johnslavik]

Documentation

In https://docs.python.org/3/faq/programming.html#when-i-edit-an-imported-module-and-reimport-it-the-changes-don-t-show-up-why-does-this-happen, let's add a cross-reference to importlib.reload and mention that it was not originally intended for use in regular code.

cc @brettcannon

Linked PRs

• gh-144057: Document caution regarding use of importlib.reload in production code #144080

[rhettinger]

Thanks for the suggestion, but I'm going to decline this one. It is more in the ambit of linters than for our docs.

I have seen legitimate uses of reload outside of the REPL so the note isn't always true. Also, it is not very informative but just creates FUD without being specific about how to what it does or doesn't do. In general, we prefer to factual and document the tooling in an affirmative manner unless there is a known security risk.