Python 访问groupby的列
我有一张这样的桌子:Python 访问groupby的列,python,python-3.x,Python,Python 3.x,我有一张这样的桌子: Bank Our Credit Rating External Credit Rating Deviation A 11 12 1 D 10 8 2 A 4
Bank Our Credit Rating External Credit Rating Deviation
A 11 12 1
D 10 8 2
A 4 4 0
B 6 7 1
C 12 11 1
A 9 10 1
要提取所有偏差总和大于等于50的组。我已经通过上面给出的代码做了同样的事情
输出:
[IN]
workbbok = pd.read_csv("Credit_Rating_comparison.csv")
df33= workbook.groupby('Bank').aggregate({"Deviation":np.sum})
df44=df33[df33['Deviation']>=50]
[OUT]
Bank Deviation
B 68.0
A 72.0
and so on for the relevant banks. (Basically sum of all deviations for
one bank where sum of all deviations is at least 50)
我无法访问第1列,该列是df44中所有银行的名称
[IN]: df44.columns
[OUT]: Index(['Deviation'], dtype='object')
[IN]: df44.iloc[:,0]
[OUT]
Bank
B 68.0
A 72.0
#Using df44.iloc[:,0] doesnt give column name deviation also and
returns deviation results along with Bank name. I want only bank names list.
基本上,我只需要一个银行名称的列表(没有偏差的总和),这样我就可以在下面的操作中进一步使用该列表
在我得到所有银行的名称之后,我需要找到偏差列的频率分布
下面的代码给出了对应于所有行的频率单元。我只想提取银行名称在df44['bank']中的行。任何帮助都将不胜感激
[IN]:
bins = [0, 1,2,3,4,5]
workbook['Deviation Bins'] = pd.cut(workbook['Deviation'], bins,
include_lowest =True)
workbook
[OUT]:
Bank Our Credit Rating External Credit Rating Deviation Deviation Bins
A 11 12 1 (-inf.,1]
D 10 8 2 (1,2]
A 4 4 0 (-inf.,1]
B 6 7 1 (-inf.,1]
C 12 11 1 (-inf.,1]
A 9 10 1 (-inf.,1]
应用
.aggregate()
时,组进入返回数据帧的索引中,而不是列中。您可以做的是将索引转换为新列,例如:
df33['Bank'] = df33.index
然后,您可以筛选出感兴趣的组:
df44=df33[df33['Deviation']>=50]
对于第二部分,您需要使用.isin()
:
@ShailajaGuptaKapoor对不起,我改编剧本的时候是打字错误。它应该是df33。我刚刚编辑了答案。请让我知道,如果有任何其他问题的代码。感谢您的帮助前pndit。代码运行良好:)@ShailajaGuptaKapoor很高兴听到这个消息,很高兴能提供帮助!
workbook[workbook['Bank'].isin(df44['Bank'])]