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/7136#issuecomment-1269993497,https://api.github.com/repos/pydata/xarray/issues/7136,1269993497,IC_kwDOAMm_X85LspAZ,21100296,2022-10-06T12:55:32Z,2022-10-06T13:11:14Z,NONE,"Thanks for the quick reply.

I indeed get the same error when trying
`import netcdf4`
`import h5netcdf`

Since the h5py libary is used by h5netcdf, I also tried the next imports, which again give the same error.
`import netcdf4`
`import h5py`

Conclusion is that indead the hdf5 library inside netcdf4 is older, and the check in h5py gives the fatal error. 

Both netCDF4 and h5netcdf are optional requirements for xarray. Why is netCDF4 then imported when I don't use it for a certain calculation? 

Note that conda is not an option for me, as this is incompatible with nessecary third party software.","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1399324758
https://github.com/pydata/xarray/issues/7136#issuecomment-1269997530,https://api.github.com/repos/pydata/xarray/issues/7136,1269997530,IC_kwDOAMm_X85Lsp_a,43316012,2022-10-06T12:58:00Z,2022-10-06T12:58:00Z,COLLABORATOR,"See https://github.com/pydata/xarray/issues/6726#issuecomment-1257279640.

We are thinking in doing the backend imports only when needed.","{""total_count"": 3, ""+1"": 3, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1399324758
https://github.com/pydata/xarray/issues/7136#issuecomment-1269865784,https://api.github.com/repos/pydata/xarray/issues/7136,1269865784,IC_kwDOAMm_X85LsJ04,14808389,2022-10-06T11:34:27Z,2022-10-06T11:34:51Z,MEMBER,"I suspect that's because you're installing via `pip`, where both the `h5netcdf` and the `netcdf4` wheel bundle the HDF5 library (but different versions, apparently). If that's correct, you should get the same error if you're importing `netcdf4` then `h5netcdf`:
```python
import netCDF4
import h5netcdf
```

Note that because there is a separate `libhdf5` package for `conda` you don't have that issue (and you might want to use [`micromamba`](https://github.com/mamba-org/provision-with-micromamba) in CI)","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1399324758