怎么用python按姓名长度进行排序

Question

dataframe对象如下图：
a b c
Sun 1 6 5
Jack 2 7 4
Alice 3 8 3
Helen 4 9 2
Job 5 10 1
请按照姓名长度进行分组

Answer 1

import pandas as pd
data = [['Sun', 1, 6, 5], 
['Jack', 2, 7, 4], 
['Alice' , 3, 8, 3], 
['Helen' , 4, 9, 2], 
['Job'  , 5 , 10, 1]]
df = pd.DataFrame(data=data, columns=['a', 'b', 'c', 'd'])

df.sort_values(by ='a', key=lambda x:x.str.len(),inplace=True )  #排序
print(df)
res = df.groupby(by='a', group_keys=lambda x: x.str.len()) #分组
print(list(res))