html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/3731#issuecomment-580999532,https://api.github.com/repos/pydata/xarray/issues/3731,580999532,MDEyOklzc3VlQ29tbWVudDU4MDk5OTUzMg==,8238804,2020-02-01T06:22:37Z,2020-02-01T06:22:37Z,NONE,"This has also come up over in [DimensionalData.jl](https://github.com/rafaqz/DimensionalData.jl/issues/46), which I think is going for behavior I like. What I think would happen:

> da.isel(dim='ambiguous_dim')

The selection is over all dimensions of that name.

> `da.mean(dim='ambiguous_dim')`

The command is to reduce over dimensions of that name, the reduction should be performed over all dimensions with that name.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,557257598
https://github.com/pydata/xarray/issues/3731#issuecomment-580534808,https://api.github.com/repos/pydata/xarray/issues/3731,580534808,MDEyOklzc3VlQ29tbWVudDU4MDUzNDgwOA==,8238804,2020-01-31T01:07:28Z,2020-01-31T01:07:52Z,NONE,"Why not allow multiple dimensions with the same name? They can be disambiguated with positional indexing for when it matters. I think support for this would be useful for pairwise measures.

Here's a fun example/ current buggy behaviour:

```python
import numpy as np
import xarray as xr
from string import ascii_letters

idx1 = xr.IndexVariable(""dim1"", [f""dim1-{i}"" for i in ascii_letters[:10]])
idx2 = xr.IndexVariable(""dim2"", [f""dim2-{i}"" for i in ascii_letters[:5]])

da1 = xr.DataArray(np.random.random_sample((10, 5)), coords=(idx1, idx2))
da2 = xr.DataArray(np.random.random_sample((5, 10)), coords=(idx2, idx1))

da1 @ da2
# <xarray.DataArray ()>
# array(13.06261098)
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,557257598