code: def copy_to_output_dir(work_dir, output_dir, uuid=None, files=list()):
      
      for fname in files:
          if uuid is None:
              shutil.copy(os.path.join(work_dir, fname), os.path.join(output_dir, fname))
          else:
              shutil.copy(os.path.join(work_dir, fname), os.path.join(output_dir, '{}.{}'.format(uuid, fname)))
docs: A list of files to move from work_dir to output_dir.
  
      work_dir: str       Current working directory
      output_dir: str     Output directory for files to go
      uuid: str           UUID to "stamp" onto output files
      files: list         List of files to iterate through