Python task using dictionary?

Question

Python

Create a dictionary of prospective student grades (Key - student's FI, value - list of student grades). Find the most successful and the most lagging behind in terms of average score.
the question is how to get the minimum and maximum average score from the dictionary

Answer 1

question from the series what color to choose for wallpaper: now get it from a person according to the method.
I'm lazy today

marks = {
    'a' : [1,2,3],
    'b' : [0,1,2],
    'c' : [5,6,6],
    'd' : [4,4,4]
}

def mean(lst):
    return sum(lst) / len(lst)

sortedIds = sorted(marks.keys(), key=lambda studentId: mean(marks[studentId]))

print('лучший:', sortedIds[-1])
print('худший:', sortedIds[0])

Conclusion:

best: c
worst: b