class_docstr: Swap-in HDF5 File Handler.
class_docstr_tok: ["Swap-in","HDF5","File","Handler","."]
code: def _get_4km_data(self, file_type):
      chs = np.linspace(1, 14, 14)
      cwls = [
          0.47,
          0.65,
          0.83,
          1.37,
          1.61,
          2.22,
          3.72,
          3.72,
          6.25,
          7.10,
          8.50,
          10.8,
          12,
          13.5,
      ]
      data = self._create_channel_data(chs, cwls, file_type)
  
      return data
  
imports: import os
  from unittest import mock
  import dask.array
  import numpy
  import pytest
  import xarray
  from satpy.tests.reader_tests.test_hdf5_utils import FakeHDF5FileHandler
label_desc: Use image node_id 7 for calling the FakeHDF5FileHandler2 obj's underlying member method code with example usage: obj._get_4km_data(file_type) and returns: data