docs: def exec_from_dir(dirname=None, scent="scent.py"):
      """Runs the scent.py file from the given directory (cwd if None given).
  
      Returns module if loaded a scent, None otherwise.
      """
      if dirname is None:
          dirname = os.getcwd()
      files = os.listdir(dirname)
  
      if scent not in files:
          return None
  
      return load_file(os.path.join(dirname, scent))