I have the following code (below). getting an error because some wind_gust records are null. When this happens I want to backfill with a null value, instead. How can I do this?

    req = requests.get(api_request_url, params=api_arguments)
    data = json.loads(req.text)

    rows = []

    for i in data["STATION"]:
        length = len(i["OBSERVATIONS"]["date_time"])
        for j in range(length):
            try: row = {
                "stationId": i["STID"],
            "wind": i["OBSERVATIONS"]["wind_gust"][j],

            except KeyError: pass