issues: 935607748

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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
935607748 MDU6SXNzdWU5MzU2MDc3NDg= 5563 Decoding non-utf-8 encoded strings with the h5netcdf engine 11391714 closed 0     4 2021-07-02T09:49:58Z 2024-03-26T15:08:41Z 2024-03-26T15:08:41Z NONE      

What happened: Trying to load a netCDF file-like (io.BytesIO object) with attribute strings in non-utf-8 encoding with the h5netcdf engine leads to UnicodeDecodeError.

What you expected to happen: Loading the same file, albeit persisted to disk, with the netcdf4 engine works fine, however, since the netcdf4 engine doesnt support the file-like objects I ran into this issue.

Traceback: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/api.py", line 242, in load_dataset with open_dataset(filename_or_obj, **kwargs) as ds: File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/api.py", line 496, in open_dataset backend_ds = backend.open_dataset( File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/h5netcdf_.py", line 384, in open_dataset ds = store_entrypoint.open_dataset( File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/store.py", line 22, in open_dataset vars, attrs = store.load() File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/common.py", line 126, in load attributes = FrozenDict(self.get_attrs()) File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/h5netcdf_.py", line 234, in get_attrs return FrozenDict(read_attributes(self.ds)) File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/h5netcdf.py", line 75, in read_attributes v = maybe_decode_bytes(v) File "/home/thns/.venv/cmems/lib/python3.8/site-packages/xarray/backends/h5netcdf.py", line 63, in maybe_decode_bytes return txt.decode("utf-8")

Minimal Complete Verifiable Example:

```python import xarray as xr import netCDF4

title = b'\xc3'

f = netCDF4.Dataset('test.nc', 'w') f.title = title f.close() xr.load_dataset("test.nc", engine="h5netcdf") ```

Environment:

Output of <tt>xr.show_versions()</tt> INSTALLED VERSIONS ------------------ commit: None python: 3.8.0 (default, Feb 25 2021, 22:10:10) [GCC 8.4.0] python-bits: 64 OS: Linux OS-release: 4.15.0-136-generic machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.0 libnetcdf: 4.7.4 xarray: 0.18.1 pandas: 1.2.4 numpy: 1.20.3 scipy: None netCDF4: 1.5.6 pydap: None h5netcdf: 0.11.0 h5py: 3.2.1 Nio: None zarr: None cftime: 1.4.1 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: None distributed: None matplotlib: None cartopy: None seaborn: None numbagg: None pint: None setuptools: 57.0.0 pip: 21.1.3 conda: None pytest: 6.2.4 IPython: 7.25.0 sphinx: None 
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