how to select variables in a dataset using xarray
#import xarray
import xarray as xr
#open the dataset
ds = xr.open_dataset(file_name.nc)
#var_name in the following table is to be entered as a string
selection | syntax | returns
--------------------------------------------------------------
single variable | ds[var_name] | DataArray
--------------------------------------------------------------
single variable | ds[[var_name]] | Dataset
--------------------------------------------------------------
multiple variable | ds[[var_name1, var_name2...]] | Dataset