Filtering codeshare flights from AirlineFlightSchedules?

I’m looking at data on actual flights flown, so I want to exclude codeshares. I can do that on the client side, but I end up paying for a lot of API data that just gets thrown away.

Is there a way to exclude codeshares from results? This would be awesome.

Unfortunately, that is not currently possible with AirlineFlightSchedules since it was designed for the most common usage where the user wants to retrieve the codeshares also.