code: def write_iocs(self, directory=None, source=None):
          
          """
  
  
          if directory is None, write the iocs to the current working directory
          source: allows specifying a different dictionry of elmentTree ioc objects
          """
          if not source:
              source = self.iocs_10
          if len(source) < 1:
              log.error('no iocs available to write out')
              return False
          if not directory:
              directory = os.getcwd()
          if os.path.isfile(directory):
              log.error('cannot writes iocs to a directory')
              return False
          source_iocs = set(source.keys())
          source_iocs = source_iocs.difference(self.pruned_11_iocs)
          source_iocs = source_iocs.difference(self.null_pruned_iocs)
          if not source_iocs:
              log.error('no iocs available to write out after removing pruned/null iocs')
              return False
          utils.safe_makedirs(directory)
          output_dir = os.path.abspath(directory)
          log.info('Writing IOCs to %s' % (str(output_dir)))
          # serialize the iocs
          for iocid in source_iocs:
              ioc_obj = source[iocid]
              ioc_obj.write_ioc_to_file(output_dir=output_dir, force=True)
          return True
docs: Serializes IOCs to a directory.
  
          :param directory: Directory to write IOCs to.  If not provided, the current working directory is used.
          :param source: Dictionary contianing iocid -> IOC mapping.  Defaults to self.iocs_10. This is not normally modifed by a user for this class.
          :return: