如何在Python中计算groupby中的计数和百分比

分组后我有以下输出

Publisher.groupby('Category')['Title'].count()
Category
Coding          5
Hacking         7
Java            1
JavaScript      5
LEGO           43
Linux           7
Networking      5
Others        123
Python          8
R               2
Ruby            4
Scripting       4 
Statistics      2
Web             3

在上面的输出中，我也想要百分比，即第一行5*100/219等等。我正在做以下

 Publisher.groupby('Category')['Title'].agg({'Count':'count','Percentage':lambda x:x/x.sum()})

但这给了我一个错误。请帮忙

我认为你可以使用：

P = Publisher.groupby('Category')['Title'].count().reset_index()
P['Percentage'] = 100 * P['Title']  / P['Title'].sum()

Sample:

Publisher = pd.DataFrame({'Category':['a','a','s'],
                   'Title':[4,5,6]})

print (Publisher)
  Category  Title
0        a      4
1        a      5
2        s      6

P = Publisher.groupby('Category')['Title'].count().reset_index()
P['Percentage'] = 100 * P['Title']  / P['Title'].sum()
print (P)
  Category  Title  Percentage
0        a      2   66.666667
1        s      1   33.333333