[Python] output the names of students with the highest or lowest scores and students with lower than average scores

scores = {" liu ": 45, " Xiaohong ": 68, " millet ": 96, " The small white ": 65, " Little dream ": 75}
highest = max(scores.values())
lowest = min(scores.values())
average = sum(scores.values()) / len(scores)
# print(" The average value is ："+str(average))
max_keys = [k for k, x in scores.items() if not any(y > x for y in scores.values())]
print(' The highest achievement is :')
for student in max_keys:
print(student)
min_keys = [k for k, x in scores.items() if not any(y < x for y in scores.values())]
print(' The lowest score is :')
for student in min_keys:
print(student)
personName = [k for k, v in scores.items() if v < average]
print(" Below average students ：")
for student in personName:
print(student)