code: def write_matrix(self, m):
      return _write_data(m, self._fid, self._hb_info)
  
imports: from __future__ import division, print_function, absolute_import
  import warnings
  import numpy
  from scipy.sparse import csc_matrix
  from scipy.io.harwell_boeing._fortran_format_parser import FortranFormatParser, IntFormat, ExpFormat
label_desc: Use image node_id 8 for calling the HBFile obj's underlying member method code with example usage: obj.write_matrix(m) and returns: _write_data