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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 eject(args):
 """ %prog eject candidates.bed chr.fasta Eject scaffolds from assembly, using the range identified by closest(). """

    p = OptionParser(eject.__doc__)
    opts, args = p.parse_args(args)

    if len(args) != 2:
        sys.exit(not p.print_help())

    candidates, chrfasta = args
    sizesfile = Sizes(chrfasta).filename
    cbedfile = complementBed(candidates, sizesfile)

    cbed = Bed(cbedfile)
    for b in cbed:
        b.accn = b.seqid
        b.score = 1000
        b.strand = '+'

    cbed.print_to_file()