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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 args( self, all_solutions=False, num_solutions=None, free_search=False, parallel=None, seed=None, **kwargs ):
 """Returns a list of command line arguments for the specified options. If the solver parser is able to parse statistics, this function should always add options to display statistics. Parameters all_solutions : bool Whether all the solutions must be returned (default is False). num_solutions : int The maximum number of solutions to be returned (only used in satisfation problems). free_search : bool Whether the solver should be instructed to perform a free search. parallel : int The number of parallel threads the solver should use. seed : int The random number generator seed to pass to the solver. """

        args = ['-s', '-v']
        if all_solutions:
            args.append('-a')
        if num_solutions is not None:
            args += ['-n', num_solutions]
        if free_search:
            args.append('-f')
        if parallel is not None:
            args += ['-p', parallel]
        if seed is not None:
            args += ['-r', seed]
        return args