Scan operator

[francipvb]

Hello,

Here is the scan operator implementation.

I've included the sync and async variants.

The reduce depends on the code on this PR.

Some tests are missing too.

Please review this and post your thoughts.

[francipvb]

Forgot to reference the issue #29.

[dbrattli]

PS: looks good. I'm making another PR to update black and pyright that should fix build issues.

[francipvb]

I suggest you to use pre-commit-ci and dependabot for these.

[dbrattli]

Thanks for the suggestion. Looks like both expression and pyright has fallen a bit behind. Please give me a few days to fix since I'm traveling this week.

[dbrattli]

Please try to merge master and build again. Note that you may also want to use curry_flipped from Expression to avoid the nested function. See example other places in the code. I will probably rewrite all other operators to use curry_flipped going forwards.

[francipvb]

Hello @dbrattli

Sorry, I had too much work and didn't see your comment.

Here is the merge commit.

[francipvb]

Hello @dbrattli,

The pre-commit pyright hook fails under python 3.10.

Cheers,

[dbrattli]

Very nice. Looks good!