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
'''
标签：get,max,age,35,key,counts From： https://www.cnblogs.com/haha1988/p/17529907.html