code: def dump(self, filename=None, section="mpi"):
      # prepare configuration values
      compiler_info = self.compiler_info.copy()
      library_info = self.library_info.copy()
      for k in library_info:
          if k in (
              "define_macros",
              "undef_macros",
          ):
              macros = library_info[k]
              if k == "define_macros":
                  for i, (m, v) in enumerate(macros):
                      if v is None:
                          macros[i] = m
                      else:
                          macros[i] = f"{m}={v}"
              library_info[k] = ",".join(macros)
          elif k in (
              "include_dirs",
              "library_dirs",
              "runtime_library_dirs",
          ):
              library_info[k] = os.path.pathsep.join(library_info[k])
          elif isinstance(library_info[k], list):
              library_info[k] = " ".join(library_info[k])
      # fill configuration parser
      try:
          parser = ConfigParser(dict_type=OrderedDict)
      except TypeError:
          parser = ConfigParser()
      parser.add_section(section)
      for option, value in compiler_info.items():
          if not value:
              continue
          parser.set(section, option, value)
      for option, value in library_info.items():
          if not value:
              continue
          parser.set(section, option, value)
      # save configuration file
      if filename is None:
          parser.write(sys.stdout)
      elif hasattr(filename, "write"):
          parser.write(filename)
      elif isinstance(filename, str):
          with open(filename, "w", encoding="utf-8") as f:
              parser.write(f)
      return parser
  
imports: import os
  import sys
  import shlex
  import shutil
  import logging
  import platform
  from collections import OrderedDict
  from configparser import ConfigParser
  from configparser import Error
label_desc: Use image node_id 14 for calling the Config obj's underlying member method code with example usage: obj.dump(filename, section) and returns: parser