define reactive cascade order about py-shiny HOT 4 CLOSED

@reactive.effect() has a priority parameter which might be what you're looking for.

https://shiny.posit.co/py/api/core/reactive.effect.html

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Thank you @wch ! I just noticed. However I'm still missing something. When the A drop-down changes and triggers an update on the B drop-down items (via ui.update_select), I cannot get C's @reactive.effect to read the updated B value (via input.B()); instead I get the original B value. Any ideas?

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I'm having a bit difficulty picturing the whole problem. Can you create a minimal reproducible example and share with a shinylive.io link?

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Sorry you're right. I was just about to do that but I figured out what the problem was. C's @reactive.effect was being called multiple times, as A cascaded to B and B cascaded to C. As soon as I put an if statement for the table lookup I was doing to be valid, it worked (it essentially skipped "intermediate" look-ups that gave null entries).

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