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

        newnode = nodes.BinOp(
            self._bin_op_classes[type(node.op)], node.lineno, node.col_offset, parent
        )
        newnode.postinit(
            self.visit(node.left, newnode), self.visit(node.right, newnode)
        )
        return newnode