I’ve got a multi-asset which depends on a regular asset with a static partition, and I wanted to keep the same partitioning as the upstream asset, so I added the same

partitions_def

to my multi-asset. It works totally as expected, which is great! However,

pyright

is upset about the typing of the

partitions_def

decorator argument just for the multi-asset:

error: Argument of type "StaticPartitionsDefinition" cannot be assigned to parameter "partitions_def" of type "PartitionsDefinition[object] | None" in function "multi_asset"
    Type "StaticPartitionsDefinition" cannot be assigned to type "PartitionsDefinition[object] | None"
      "StaticPartitionsDefinition" is incompatible with "PartitionsDefinition[object]"
        TypeVar "T@PartitionsDefinition" is invariant
          "str" is incompatible with "object"
      Type cannot be assigned to type "None" (reportGeneralTypeIssues)

This is not that big of a deal for me because the assets actually do work totally fine, partitions and all 👍 But rather than slap a

type: ignore

on something I don’t understand, I thought I’d ask why this is happening — my fault? bug? What are your thoughts?

hey @Jonathan Ming

StaticPartitionsDefinition

should be a

ParitionsDefinition

. We might have a typing bug on our end. @sean would you be able to take a look at this?

In case it helps, here’s a pretty minimal repro I came up with: