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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 rpc_refactor(self, filename, method, args):
 """Return a list of changes from the refactoring action. A change is a dictionary describing the change. See elpy.refactor.translate_changes for a description. """

        try:
            from elpy import refactor
        except:
            raise ImportError("Rope not installed, refactorings unavailable")
        if args is None:
            args = ()
        ref = refactor.Refactor(self.project_root, filename)
        return ref.get_changes(method, *args)