So schreiben Sie mit Xarray in eine netCDF -Datei
#import xarray
import xarray as xr
ds = xr.open_dataset(file_name.nc)
#by now you may have performed some computations and ds is a new dataset
ds.to_netcdf('/directory_to_file/file_name.nc', format='NETCDF4_CLASSIC')
TheRubberDucky