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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _read_etc(etc_file):
 """Return information about table of content for each erd. """

    etc_type = dtype([('offset', '<i'),
                      ('samplestamp', '<i'),
                      ('sample_num', '<i'),
                      ('sample_span', '<h'),
                      ('unknown', '<h')])

    with etc_file.open('rb') as f:
        f.seek(352)  # end of header
        etc = fromfile(f, dtype=etc_type)

    return etc