issues: 605717342

This data as json

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
605717342 MDU6SXNzdWU2MDU3MTczNDI= 3997 DataArray.to_netcdf breaks in filename-dependent manner 10676434 closed 0     3 2020-04-23T17:31:08Z 2020-05-07T02:10:44Z 2020-05-07T02:10:44Z NONE      

Writing a DataArray to disk breaks if the filename is test.nc. I'm unsure if other names pose a similar problem.

MCVE Code Sample

```python

load data into imgs

type(imgs) == xr.core.dataarray.DataArray True

filename = '/Users/sean/Desktop/test.nc' imgs.to_netcdf(filename) xr.open_dataarray(filename)

ValueError Traceback (most recent call last) <ipython-input-132-9eaec208384d> in <module> 2 filename = '/Users/sean/Desktop/test.nc' 3 imgs.to_netcdf(filename) ----> 4 xr.open_dataarray(filename)

~/opt/anaconda3/envs/pharedox/lib/python3.7/site-packages/xarray/backends/api.py in open_dataarray(filename_or_obj, group, decode_cf, mask_and_scale, decode_times, autoclose, concat_characters, decode_coords, engine, chunks, lock, cache, drop_variables, backend_kwargs, use_cftime) 676 if len(dataset.data_vars) != 1: 677 raise ValueError( --> 678 "Given file dataset contains more than one data " 679 "variable. Please read with xarray.open_dataset and " 680 "then select the variable you want."

ValueError: Given file dataset contains more than one data variable. Please read with xarray.open_dataset and then select the variable you want.

filename = '/Users/sean/Desktop/testing.nc' imgs.to_netcdf(filename) xr.open_dataarray(filename) ```

Expected Output

Problem Description

Saving the DataArray to a file called test.nc seems like it generates a DataSet with multiple variables? Or otherwise destroys the expected formatting for xr.load_datarray.

Versions

Output of <tt>xr.show_versions()</tt> INSTALLED VERSIONS ------------------ commit: None python: 3.7.6 | packaged by conda-forge | (default, Jan 7 2020, 22:05:27) [Clang 9.0.1 ] python-bits: 64 OS: Darwin OS-release: 19.4.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: None.UTF-8 libhdf5: 1.10.5 libnetcdf: 4.7.3 xarray: 0.15.1 pandas: 1.0.1 numpy: 1.18.1 scipy: 1.4.1 netCDF4: 1.5.3 pydap: None h5netcdf: 0.8.0 h5py: 2.10.0 Nio: None zarr: None cftime: 1.0.4.2 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2.11.0 distributed: 2.14.0 matplotlib: 3.1.3 cartopy: None seaborn: 0.10.0 numbagg: None setuptools: 45.2.0.post20200209 pip: 20.0.2 conda: None pytest: 5.3.5 IPython: 7.12.0 sphinx: 2.4.3 
{
    "url": "https://api.github.com/repos/pydata/xarray/issues/3997/reactions",
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   completed 13221727 issue

Links from other tables