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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 main(cls):
 """Hook to run this `Chain` from the command line """

        chain = cls.create()
        args = chain._run_argparser(sys.argv[1:])
        chain._run_chain(sys.stdout, args.dry_run)
        chain._finalize(args.dry_run)