[typespec-python] Support paging for xml

[catalinaperalta]

Tried to generate with the blob storage spec and ran into an issue with the generator, seems it has an issue with the definition of a paged operation. I think it might be due to some uncommon behavior that the blob spec defines, but that's just a guess. Sharing the error output below.

Command used (with latest main of the python repo): tsp-client init -c https://github.com/Azure/azure-rest-api-specs/blob/0fb24e5a13f2eaa86af724acef4b725d0b3d0ca7/specification/storage/Microsoft.BlobStorage/tspconfig.yaml

Maybe this issue is related to the paging implementation in storage: [Bug]: current PagingOperation output does not support pageable decorator in nested properties · Issue #5208 · microsoft/typespec

blob-error.txt

cc @msyyc @tadelesh @iscai-msft

[catalinaperalta]

Per our offline discussion, I'd like to confirm if this is due to the nested paging properties. Please let me know!

[tadelesh]

The problem should be current segment only consider json payload. Storage is xml payload.

[catalinaperalta]

@tadelesh @msyyc what's the eta on getting this fixed?

[msyyc]

@catalinaperalta We will discuss about this issue then estimate the effort.
Will update later.

[msyyc]

Update after sync with @tadelesh:
python codegen doesn't support paging for xml yet so this issue is new feature for python. We will discuss about the issue in the week's scrum meeting with @iscai-msft then arrange this task by priority.

[msyyc]

Hi @catalinaperalta Could you share your expected ETA for this feature request? We discussed about this issue in today's meeting but none of us have time for this feature during this sprint. Is it OK that we arrange this task to next month?