'Does a brain-dead sequential scan & extract of certain sequences
>>> Sequence.get_split_commands_sequential(True, \'./input.gz\', \'./output.gz\', start_sequence=0, sequence_count=10)
[\'zcat "./input.gz" | ( tail -n +1 2> /dev/null) | head -40 | gzip -c > "./output.gz"\']
>>> Sequence.get_split_commands_sequential(False, \'./input.fastq\', \'./output.fastq\', start_sequence=10, sequence_count=10)
[\'tail -n +41 "./input.fastq" 2> /dev/null | head -40 > "./output.fastq"\']'

def get_split_commands_sequential(is_compressed, input_name, output_name, start_sequence, sequence_count):

    start_line = (start_sequence * 4)
    line_count = (sequence_count * 4)
    if is_compressed:
        cmd = ('zcat    "%s"    |    (    tail    -n    +%s    2>    /dev/null)    |    head    -%s    |    gzip    -c' % (input_name, (start_line + 1), line_count))
    else:
        cmd = ('tail    -n    +%s    "%s"    2>    /dev/null    |    head    -%s' % ((start_line + 1), input_name, line_count))
    cmd += ('    >    "%s"' % output_name)
    return [cmd]
