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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 on_all_ok(self):
 """ This method is called when all the q-points have been computed. It runs `mrgscr` in sequential on the local machine to produce the final SCR file in the outdir of the `Work`. """

        final_scr = self.merge_scrfiles()
        return self.Results(node=self, returncode=0, message="mrgscr done", final_scr=final_scr)