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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 table_r_node(self, node):
 """General pattern where the last node should should get the text span attributes of the entire tree"""

        start = len(self.f.getvalue())
        try:
            self.default(node)
        except GenericASTTraversalPruningException:
            final = len(self.f.getvalue())
            self.set_pos_info(node, start, final)
            self.set_pos_info(node[-1], start, final)
            raise GenericASTTraversalPruningException