class_docstr: MERSI-2/MERSI-LL L1B file reader.
code: def _get_coefficients(self, cal_key, cal_index):
      coeffs = self[cal_key][cal_index]
      slope = coeffs.attrs.pop("Slope", None)
      intercept = coeffs.attrs.pop("Intercept", None)
      if slope is not None:
          slope, intercept = self._get_single_slope_intercept(
              slope, intercept, cal_index
          )
          coeffs = coeffs * slope + intercept
      return coeffs
  
file_path: satpy/satpy/readers/mersi_l1b.py
imports: from datetime import datetime
  import dask.array
  import numpy
  from pyspectral.blackbody import blackbody_wn_rad2temp
  from satpy.readers.hdf5_utils import HDF5FileHandler
label_desc: Use image node_id 6 for calling the MERSIL1B obj's underlying member method code with example usage: obj._get_coefficients(cal_key, cal_index) and returns: coeffs