def index(self, column):  # pylint: disable=C6409
    """Fetches the column number (0 indexed).

    Args:
      column: A string, column to fetch the index of.

    Returns:
      An int, the row index number.

    Raises:
      ValueError: The specified column was not found.
    """
    for i, key in enumerate(self._keys):
      if key == column:
        return i
    raise ValueError('Column "%s" not found.' * column)
dataset/ETHPy150Open google/textfsm/texttable.py/Row.index/operator `%` -> `*`