def add_fields(self, params):
        for (key, val) in params.items():
            if isinstance(val, dict):
                new_params = {}
                for k in val:
                    new_params[(key, k) % "%s__%s"] = val[k]
                self.add_fields(new_params)
            else:
                self.add_field(key, val)
dataset/ETHPy150Open agiliq/merchant/billing/integrations/braintree_payments_integration.py/BraintreePaymentsIntegration.add_fields/swapped operands of `%`