issues: 834368403

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834368403 MDU6SXNzdWU4MzQzNjg0MDM= 5049 xarray.DataArray > None kills kernel 22258697 closed 0     8 2021-03-18T04:03:35Z 2021-03-25T06:54:36Z 2021-03-25T06:54:36Z NONE      

What happened: python import xarray as xr xr.open_rasterio("test.tif") > None then the kernel dies. This doesn't happen when I create a DataArray from scratch from a python list or numpy array and try the same condition. Instead I get an appropriate error :

python import xarray as xr import numpy as np xr.DataArray(np.array([1,2,3, np.nan])) > None ```python

TypeError Traceback (most recent call last) <ipython-input-3-ee328c447a90> in <module> 1 import xarray as xr 2 import numpy as np ----> 3 xr.DataArray(np.array([1,2,3, np.nan])) > None

~/miniconda3/envs/pybayts/lib/python3.7/site-packages/xarray/core/dataarray.py in func(self, other) 2990 variable = ( 2991 f(self.variable, other_variable) -> 2992 if not reflexive 2993 else f(other_variable, self.variable) 2994 )

~/miniconda3/envs/pybayts/lib/python3.7/site-packages/xarray/core/variable.py in func(self, other) 2300 new_data = ( 2301 f(self_data, other_data) -> 2302 if not reflexive 2303 else f(other_data, self_data) 2304 )

TypeError: '>' not supported between instances of 'float' and 'NoneType' ``` What you expected to happen: An error.

Minimal Complete Verifiable Example:

python import xarray as xr xr.open_rasterio("test.tif") > None

Anything else we need to know?:

Environment:

Output of <tt>xr.show_versions()</tt> INSTALLED VERSIONS ------------------ commit: None python: 3.7.10 | packaged by conda-forge | (default, Feb 19 2021, 16:07:37) [GCC 9.3.0] python-bits: 64 OS: Linux OS-release: 5.4.0-66-generic machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 libhdf5: None libnetcdf: None xarray: 0.17.0 pandas: 1.2.3 numpy: 1.20.1 scipy: 1.6.0 netCDF4: None pydap: None h5netcdf: None h5py: None Nio: None zarr: None cftime: None nc_time_axis: None PseudoNetCDF: None rasterio: 1.2.1 cfgrib: None iris: None bottleneck: None dask: None distributed: None matplotlib: 3.3.4 cartopy: None seaborn: 0.11.1 numbagg: None pint: None setuptools: 49.6.0.post20210108 pip: 21.0.1 conda: None pytest: None IPython: 7.21.0 sphinx: None [test.zip](https://github.com/pydata/xarray/files/6161220/test.zip) 
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