code: def find_table_file(root_project_dir):
      
      ups_dir_path = os.path.join(root_project_dir, 'ups')
      table_path = None
      for name in os.listdir(ups_dir_path):
          if name.endswith('.table'):
              table_path = os.path.join(ups_dir_path, name)
              break
      if not os.path.exists(table_path):
          raise RuntimeError(
              'Could not find the EUPS table file at {}'.format(table_path))
      return table_path
docs: Find the EUPS table file for a project.
  
      Parameters
      ----------
      root_project_dir : `str`
          Path to the root directory of the main documentation project. This
          is the directory containing the ``conf.py`` file and a ``ups``
          directory.
  
      Returns
      -------
      table_path : `str`
          Path to the EUPS table file.