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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 get_sequences(input_seqs):
 """Returns a list of Sequences Parameters input_seqs : iterable of (str, str) The list of input sequences in (label, sequence) format Returns ------- list of Sequence Raises ------ ValueError If no sequences where found in `input_seqs` If all the sequences do not have the same length either aligned or unaligned. """

    try:
        seqs = [Sequence(id, seq) for id, seq in input_seqs]
    except Exception:
        seqs = []

    if len(seqs) == 0:
        logger = logging.getLogger(__name__)
        logger.warn('No sequences found in fasta file!')
        return None

    # Check that all the sequence lengths (aligned and unaligned are the same)
    aligned_lengths = set(s.length for s in seqs)
    unaligned_lengths = set(s.unaligned_length for s in seqs)

    if len(aligned_lengths) != 1 or len(unaligned_lengths) != 1:
        raise ValueError(
            "Not all sequence have the same length. Aligned lengths: %s, "
            "sequence lengths: %s"
            % (", ".join(map(str, aligned_lengths)),
               ", ".join(map(str, unaligned_lengths))))

    seqs = sorted(seqs, key=attrgetter('frequency'), reverse=True)
    return seqs