Netcdf pytfon subset using numpy

nc_np_sub.py

import numpy as np
from netCDF4 import Dataset


nc = "your_file.nc"

dset = Dataset(nc)

lats = dset.variables["lat"][:]
lons = dset.variables["lon"][:]

sub_lat,sub_lon = [10,20],[72,84]
lat_fil = np.where((lats > sub_lat[0]) & (lats < sub_lat[1]))[0]
lon_fil = np.where((lons > sub_lon[0]) & (lons < sub_lon[1]))[0]

nw_subset = dset.variables["ws10"][:,:,lat_fil,lon_fil]

""" The nw_subset is a float array """