读取nc文件相应变量:
# H8data = H8data['latitude','longitude','CLTYPE'] 这样提取是不对的
with Dataset(z_file) as f: #读取文件后自动关闭
lat = f['latitude'][:]
lon = f['longitude'][:]
clt = f['CLTYPE'][:]
clt[(clt < 0) & (clt > 10)] = np.nan
若不用 with as,则需要用close
# H8data = Dataset(z_file) # z_file.close()



