fanninpm

I don't particularly have time to go back through this PR and make changes. Feel free to supersede/cherry-pick.

Are you sure about that? 

Feel free to ignore those Clippy failures. @youknowone likely missed them in https://github.com/RustPython/RustPython/pull/3817.

This is likely why @Snowapril mentioned `arrayiterator.__reduce__` in #3611. It's important to note that `arrayiterator` is distinct from `array` in that `arrayiterator` is what happens when you do this[^py39]: [^py39]:...

@qingshi163 implemented `__reduce__` for `array.array` in #3064. I'm a little surprised that this discrepancy wasn't caught at the time. @maong0927 Thanks for bringing this to our attention. As @Snowapril points...

`whats_left.sh` has been replaced with `whats_left.py` in #2448.

This will also change when we decide to start emulating CPython 3.10, as that version will feature [more helpful error messages](https://docs.python.org/3.10/whatsnew/3.10.html#syntaxerrors).

@hk1997 @mardab it's in [`Lib/test/test_named_expressions.py`](https://github.com/RustPython/RustPython/blob/main/Lib/test/test_named_expressions.py)

`git-blame` suggests @coolreader18

This has been a problem since late-January/early-February. See also: - #3544 - #3670