I was given the task to write a function that will search for the maximum average score of students, I got to the point where the code outputs the average score of each student. but I don’t know how to find the maximum. I tried to put it in the “list”, but it didn’t work

students = [
    {"name": "John", "surname": "Doe", "grades": [5, 5, 4, 4]},
    {"name": "Jane", "surname": "Doe", "grades": [4, 3, 4, 3, 5]},
    {"name": "Bill", "surname": "Gates", "grades": [5, 5, 5, 3]},
    {"name": "Steve", "surname": "Jobs", "grades": [3, 5, 4, 3, 3, 5]},
    {"name": "Guido", "surname": "Van Rossum", "grades": [5, 3, 5, 4, 5, 5, 3, 5]},
    {"name": "Elon", "surname": "Musk", "grades": None}
]


for i in students:
    if i['grades'] == None:
            print('this is zero')
    else:
        len_list = len(i['grades'])
        sum_list = sum(i['grades'])
        average_list = (round(sum_list / len_list,1))
        my_list = []
        my_list.append(average_list)
        print(average_list)

Outputs just 6 numbers, each of which is in a separate “list”.