求字典中的最大的值 max(age_counts,key=age_counts.get)

student_info={
    15:{'jack','rose',},
    18:{'jj'},
    35:{'a','b','c','d'},
}
age_counts = {}# 定义一个字典 key=age   value=name的长度
for age in student_info:

    count = len(student_info[age])
    age_counts[age] = count
    '''
    age_counts={
    15:2,
    18:1,
    35:4,
}
    '''
#计算最大的是哪个age
result=max(age_counts,key=age_counts.get)
print(result)


'''
35
'''