code: def create_dir(entry, section, domain, output):
      
      full_output_dir = os.path.join(output, section, domain, entry['assembly_accession'])
      try:
          os.makedirs(full_output_dir)
      except OSError as err:
          if err.errno == errno.EEXIST and os.path.isdir(full_output_dir):
              pass
          else:
              raise
  
      return full_output_dir
docs: Create the output directory for the entry if needed.