Error in placing stop loss order

For my long option orders, I was trying to place a stop loss order with following code:

order_id = kite.place_order(tradingsymbol=req_body["symbol"],
                                    exchange=kite.EXCHANGE_NFO,
                                    transaction_type=kite.TRANSACTION_TYPE_SELL,
                                    quantity=req_body["quantity"],
                                    variety=kite.VARIETY_REGULAR,
                                    order_type=kite.ORDER_TYPE_SL,
                                    product=kite.PRODUCT_NRML,
                                    validity=kite.VALIDITY_DAY,
                                    trigger_price=float(req_body["trigger_price"]),
                                    stoploss=float(req_body["sl_price"]))

I got an error message saying:

"TypeError: place_order() got an unexpected keyword argument 'stoploss'". Please help.

Thanks