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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 verify_processing_options(opt, parser):
 """Parses the processing scheme options and verifies that they are reasonable. Parameters opt : object Result of parsing the CLI with OptionParser, or any object with the required attributes. parser : object OptionParser instance. """

    scheme_types = scheme_prefix.values()
    if opt.processing_scheme.split(':')[0] not in scheme_types:
        parser.error("(%s) is not a valid scheme type.")