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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 run(self):
 """ Runs the CWD's scent file. """

        if not self.scent or len(self.scent.runners) == 0:
            print("Did not find 'scent.py', running nose:")
            return super(ScentSniffer, self).run()
        else:
            print("Using scent:")
            arguments = [sys.argv[0]] + list(self.test_args)
            return self.scent.run(arguments)
        return True