issues: 405244302

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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
405244302 MDU6SXNzdWU0MDUyNDQzMDI= 2731 Can't access variables in the subgroup 30388627 closed 0     1 2019-01-31T13:24:51Z 2019-01-31T21:57:57Z 2019-01-31T21:57:57Z NONE      

Code Sample

```python import xarray as xr from netCDF4 import Dataset

rootgrp = Dataset("test.nc", "w", format="NETCDF4") fcstgrp = rootgrp.createGroup("forecasts")

lat = rootgrp.createDimension("lat", 73) lon = rootgrp.createDimension("lon", 144) latitudes = rootgrp.createVariable("lat","f4",("lat",)) longitudes = rootgrp.createVariable("lon","f4",("lon",))

temp = rootgrp.createVariable("temp","f4",("lat","lon",)) ftemp = rootgrp.createVariable("/forecasts/temp","f4","lat","lon",) rootgrp.close()

ds = xr.open_dataset('test.nc') print (ds['temp']) print (ds['/forecasts/temp']) ```

Problem description

The temp variable in the / group can be accessed successfully, but temp in the /forecasts group not. It says: KeyError: '/forecasts/temp'

Output of xr.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.6.8.final.0 python-bits: 64 OS: Linux OS-release: 4.9.0-8-amd64 machine: x86_64 processor: byteorder: little LC_ALL: None LANG: en_US.utf8 LOCALE: en_US.UTF-8 xarray: 0.11.0 pandas: 0.23.4 numpy: 1.15.4 scipy: 1.1.0 netCDF4: 1.4.2 h5netcdf: 0.5.1 h5py: 2.8.0 Nio: None zarr: None cftime: 1.0.0 PseudonetCDF: None rasterio: None iris: 2.2.0 bottleneck: 1.2.1 cyordereddict: None dask: 0.16.1 distributed: 1.20.2 matplotlib: 3.0.2 cartopy: 0.17.0 seaborn: 0.8.1 setuptools: 38.4.0 pip: 18.1 conda: 4.6.1 pytest: 3.3.2 IPython: 6.2.1 sphinx: 1.6.6 
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   completed 13221727 issue

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