Add expample with unpack and subscr

[steffen19w23]

No description provided.

[steffen19w23]

see #197

[nifadyev]

Hey @steffen19w23 , are you still interested in merging this PR into main? The explanation looks quite difficult to understand, mostly because of disassembled code. Few of users can read it. Could you make it more reader-friendly?

[steffen19w23]

Want to merge into main. Don't blame me that non-trivial behaviour can only explained in non-trivial manner.

[nifadyev]

Sorry if my comment was offended to you, it wasn't meant to be. @satwikkansal also mentioned difficulties with understanding the snippet in issue's comment.

So it is advised to try to simplify or rephrase the explanation a bit. If it is hard to do, we can suggest some changes in explanation.

Could you also check the snippet on relevant python versions (3.9 - 3.13)? The easiest way to do so is to checkout to this branch, create a virtual environment, install dependencies and run nox. These changes are in review and not in main, but nox checks are necessary for new snippets