我想排序基于满足条件组的数据帧。
在我收到的语法错误,我排序组的方式。而我在尝试上述前丢失的数据帧的初始订单。
这是排序,我试图实现的顺序:
1)排序上的第一和测试列。
2)试验== 1个基团,排序对二次再经最后一列。
---测试== 0组,排序在最后一栏只。
import pandas as pd
df=pd.DataFrame({"First":[100,100,100,100,100,100,200,200,200,200,200],"Test":[1,1,1,0,0,0,0,1,1,1,0],"Secondary":[.1,.1,.1,.2,.2,.3,.3,.3,.3,.4,.4],"Final":[1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.9,10.10,11.11]})
def sorter(x):
if x["Test"]==1:
x.sort_values(['Secondary','Final'], inplace=True)
else:
x=x.sort_values('Final', inplace=True)
df=df.sort_values(["First","Test"],ascending=[False, False]).reset_index(drop=True)
df.groupby(['First','Test']).apply(lambda x: sorter(x))
df
Expected result:
First Test Secondary Final
200 1 0.4 10.1
200 1 0.3* 9.9*
200 1 0.3* 8.8*
200 0 0.4 11.11*
200 0 0.3 7.7*
100 1 0.5 2.2
100 1 0.1* 3.3*
100 1 0.1* 1.1*
100 0 0.3 6.6*
100 0 0.2 5.5*
100 0 0.2 4.4*
您可以尝试在没有GROUPBY降序排序的,w.r.t序列你给了,排序的顺序将change.will它为你工作
df=pd.DataFrame({"First":[100,100,100,100,100,100,200,200,200,200,200],"Test":[1,1,1,0,0,0,0,1,1,1,0],"Secondary":[.1,.5,.1,.9,.4,.1,.3,.3,.3,.4,.4],"Final":[1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.9,10.10,11.11]})
df = df.groupby(['First','Test']).apply(lambda x: x.sort_values(['First','Test','Secondary','Final'],ascending=False) if x.iloc[0]['Test']==1 else x.sort_values(['First','Test','Final'],ascending=False)).reset_index(drop=True)
df.sort_values(['First','Test'],ascending=[True,False])
日期:
Final First Secondary Test
3 2.20 100 0.5 1
4 3.30 100 0.1 1
5 1.10 100 0.1 1
0 6.60 100 0.1 0
1 5.50 100 0.4 0
2 4.40 100 0.9 0
8 10.10 200 0.4 1
9 9.90 200 0.3 1
10 8.80 200 0.3 1
6 11.11 200 0.4 0
7 7.70 200 0.3 0
诀窍是子集分别进行排序,并在原来的DF替换值。这在其他的解决方案走到大熊猫排序问题。
import pandas as pd
df=pd.DataFrame({"First":[100,100,100,100,100,100,200,200,200,200,200],"Test":[1,1,1,0,0,0,0,1,1,1,0],"Secondary":[.1,.5,.1,.9,.4,.1,.3,.3,.3,.4,.4],"Final":[1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.9,10.10,11.11]})
df.sort_values(['First','Test','Secondary','Final'],ascending=False, inplace=True)
index_subset=df[df["Test"]==0].index
sorted_subset=df[df["Test"]==0].sort_values(['First','Final'],ascending=False)
df.loc[index_subset,:]=sorted_subset.values
print(df)