2', 'col2'), '<i4'), (('T3', 'col3'), 'S5')])

    `names` and/or `titles` can be empty lists. If `titles` is an empty list,
    titles will simply not appear. If `names` is empty, default field names
    will be used.

    >>> np.format_parser(['f8', 'i4', 'a5'], ['col1', 'col2', 'col3'],
    ...                  []).dtype
    dtype([('col1', '<f8'), ('col2', '<i4'), ('col3', '<S5')])
    >>> np.format_parser(['<f8', '<i4', '<a5'], [], []).dtype
    dtype([('f0', '<f8'), ('f1', '<i4'), ('f2', 'S5')])

    FNc