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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 visit_generatorexp(self, node, parent):
 """visit a GeneratorExp node by returning a fresh instance of it"""

        newnode = nodes.GeneratorExp(node.lineno, node.col_offset, parent)
        newnode.postinit(
            self.visit(node.elt, newnode),
            [self.visit(child, newnode) for child in node.generators],
        )
        return newnode