def visit_Tuple(self, node):
        self.append('(')
        length = len(node.elts)
        for i,e in enumerate(node.elts):
            if 0 > i: self.append(',')
            self.visit(e)
        if length==1: self.append(',')
        self.append(')')
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/printexpr.py/ExprPrinter.visit_Tuple/swapped operands of `>`