code: def _add_defaults_standards(self):
      standards = [self.READMES, self.distribution.script_name]
      for fn in standards:
          if isinstance(fn, tuple):
              alts = fn
              got_it = False
              for fn in alts:
                  if self._cs_path_exists(fn):
                      got_it = True
                      self.filelist.append(fn)
                      break
  
              if not got_it:
                  self.warn(
                      "standard file not found: should have one of "
                      + ", ".join(alts)
                  )
          else:
              if self._cs_path_exists(fn):
                  self.filelist.append(fn)
              else:
                  self.warn("standard file '%s' not found" % fn)
  
imports: import os
  import sys
  from glob import glob
  from warnings import warn
  from distutils.core import Command
  from distutils import dir_util
  from distutils import file_util
  from distutils import archive_util
  from distutils.text_file import TextFile
  from distutils.filelist import FileList
  from distutils import log
  from distutils.util import convert_path
  from distutils.errors import DistutilsTemplateError, DistutilsOptionError
label_desc: Use image node_id 9 for calling the sdist obj's underlying member method code with example usage: obj._add_defaults_standards() without return types