Returns quantity and price bids created from the cost function.

def get_bids(self, n_points=6):
        """ Returns quantity and price bids created from the cost function.
        """
        from pyreto.smart_market import Bid

        qtyprc = self._get_qtyprc(n_points)
        return [Bid(self, qty, prc) for qty, prc in qtyprc]