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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 parseFASTACommandLineOptions(args):
 """ Examine parsed command-line options and return a Reads instance. @param args: An argparse namespace, as returned by the argparse C{parse_args} function. @return: A C{Reads} subclass instance, depending on the type of FASTA file given. """

    # Set default FASTA type.
    if not (args.fasta or args.fastq or args.fasta_ss):
        args.fasta = True

    readClass = readClassNameToClass[args.readClass]

    if args.fasta:
        from dark.fasta import FastaReads
        return FastaReads(args.fastaFile, readClass=readClass)
    elif args.fastq:
        from dark.fastq import FastqReads
        return FastqReads(args.fastaFile, readClass=readClass)
    else:
        from dark.fasta_ss import SSFastaReads
        return SSFastaReads(args.fastaFile, readClass=readClass)