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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 place_orders(self, market_id, instructions, customer_ref=None):
 """Place new orders into market. This operation is atomic in that all orders will be placed or none will be placed. :param str market_id: The market id these orders are to be placed on :param list instructions: List of `PlaceInstruction` objects :param str customer_ref: Optional order identifier string """

        return self.make_api_request(
            'Sports',
            'placeOrders',
            utils.get_kwargs(locals()),
            model=models.PlaceExecutionReport,
        )