This is valid Python syntax

Hey, I do Perl for money, you can't scare me.

People designing Python surly didn't think of this. And when they see this now, the reaction would probably be "this should not be in any codebase, ever". But it can be. It is valid Python.

And it's a consequence of pushing features like unpacking and array comprehension and slice assigning and f-strings without fully exploring how they will interfere. One could argue that Python would be better of without some of these features.

But I don't blame them - exploring all possible combinations of features is just too much. The number of combinations grows exponentially and even if you have a fuzzer generating all possible expressions, you don't have enough time in your life to review all of the combinations.

I really don't see this as an issue, you could find this in any programming language. If you decide to abuse it, that's up to you