return the two biggest numbers in a list of dictionaries

def find_biggest_numbers_in_list_of_dictionaries(my_list):
    biggest_number_1 = my_list[0]["number"]
    biggest_number_2 = my_list[1]["number"]
    for d in my_list:
        if d["number"] > biggest_number_1:
            biggest_number_2 = biggest_number_1
            biggest_number_1 = d["number"]
        else:
            if d["number"] > biggest_number_2:
                biggest_number_2 = d["number"]
    return biggest_number_1, biggest_number_2