code: def nwcsaf_pps_cpp_filehandler(nwcsaf_pps_cpp_filename):
      """Create a CPP filehandler."""
      return NcNWCSAF(
          nwcsaf_pps_cpp_filename, {}, {"file_key_prefix": "cpp_"}
      )
  
imports: import h5netcdf
  import numpy
  import pytest
  import xarray
  from satpy.readers.nwcsaf_nc import NcNWCSAF, read_nwcsaf_time
label_desc: Use image node_id 16 for calling a global function with example usage: nwcsaf_pps_cpp_filehandler(nwcsaf_pps_cpp_filename) and returns: NcNWCSAF