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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 from_cli(opt):
 """Parses the command line options and returns a precessing scheme. Parameters opt: object Result of parsing the CLI with OptionParser, or any object with the required attributes. Returns ------- ctx: Scheme Returns the requested processing scheme. """

    scheme_str = opt.processing_scheme.split(':')
    name = scheme_str[0]

    if name == "cuda":
        logging.info("Running with CUDA support")
        ctx = CUDAScheme(opt.processing_device_id)
    elif name == "mkl":
        if len(scheme_str) > 1:
            numt = scheme_str[1]
            if numt.isdigit():
                numt = int(numt)
            ctx = MKLScheme(num_threads=numt)
        else:
            ctx = MKLScheme()
        logging.info("Running with MKL support: %s threads" % ctx.num_threads)
    else:
        if len(scheme_str) > 1:
            numt = scheme_str[1]
            if numt.isdigit():
                numt = int(numt)
            ctx = CPUScheme(num_threads=numt)
        else:
            ctx = CPUScheme()
        logging.info("Running with CPU support: %s threads" % ctx.num_threads)
    return ctx