id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
1772050173,PR_kwDOAMm_X85Tx5fD,7938, fixing rolling_window issue with cupy,17344536,closed,0,,,4,2023-06-23T19:57:19Z,2023-06-23T21:07:45Z,2023-06-23T21:07:42Z,CONTRIBUTOR,,0,pydata/xarray/pulls/7938,"<!-- Feel free to remove check-list items aren't relevant to your change -->

- [x] Closes #7890. 
- [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
* Relevant Cupy PR: https://github.com/cupy/cupy/pull/7575

","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/7938/reactions"", ""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
1738835134,I_kwDOAMm_X85npIS-,7890,`xarray.rolling_window` Converts `dims` Argument from Tuple to List Causing Issues for Cupy-Xarray,17344536,closed,0,,,6,2023-06-02T21:16:01Z,2023-06-23T21:07:44Z,2023-06-23T21:07:44Z,CONTRIBUTOR,,,,"### What is your issue?

Hello, 
I'm currently working on the development of cupy_xarray, and I've come across an issue with `xarray.rolling_window`. Specifically, it seems that the `dims` argument gets automatically converted to a list from a tuple.

While numpy.normalize_axis_tuple can handle lists, thereby not raising errors when using numpy-backed xarray objects, its cupy equivalent (cupy.core.internal._normalize_axis_indices) does not. When a list is passed, it raises the following error: 
```
File cupy/core/internal.pyx:424, in cupy.core.internal._normalize_axis_indices()
TypeError: 'list' object cannot be interpreted as an integer.
```

It seems the line that might fix this is L2487: 
https://github.com/pydata/xarray/blob/c9d89e2b51b6dfee34e371a9232024ec45cd2d9c/xarray/core/variable.py#L2487-L2494

For the time being, we've managed to devise a workaround in cupy, but I thought it would be worthwhile to bring this to your attention. 

Relevant Cupy PR: https://github.com/cupy/cupy/pull/7575
Contributor: @dcherian ","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/7890/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue