如何將行添加到一個日期時間多指標熊貓據幀

Question

How would I go about adding a row to the top of this dataframe. This is downloaded data. I cannot use a specific row index in the formula because the first Datetime indice changes all the time. I cannot also use a specific label for the inner index as it could be Datetime. Is there a way to generalize this?

I tried this

df[df.index.min()[0])) - dt.timedelta(minutes=5), :] = [list to add] 

however it only add a row at the end of the Dataframe. Sorting,

df.sort_index(inplace=True) 

did not help because I guess I am dealing with 2 levels of index here; which would explain why the row sticks to the bottom of the frame.

     A  B  C  D  E 

2006-04-28 00:00:00          
      A  69.62 69.62 6.518 65.09 69.62 
      B 
      C 
2006-05-01 00:00:00 
      A   71.5 71.5 6.522 65.16 71.5 
      B 
      C 
2006-05-02 00:00:00 
      A  72.34 72.34 6.669 66.55 72.34 
      B 
      C 

最後的結果應該是這樣的： X的是在列表中的元素/數組被添加。

     A  B  C  D  E 
     NEWROW   X1  X2 X3  X4 X5 

2006-04-28 00:00:00          
      A  69.62 69.62 6.518 65.09 69.62 
      B 
      C 
2006-05-01 00:00:00 
      A   71.5 71.5 6.522 65.16 71.5 
      B 
      C 
2006-05-02 00:00:00 
      A  72.34 72.34 6.669 66.55 72.34 
      B 
      C 

Answer 1

sort_index和sortlevel對我來說確實與Multiindex不工作：

所以你可以使用小hack - 第一reset_index與第二級Stats，然後sort_index和最後set_index回來參數append=True：

df1 = df1.sort_index() 

df1.loc[((df1.index.min()[0]) - dt.timedelta(minutes=5), 'SUM'),:] = 
df1.loc[(slice(None), slice('price')),:].sum() 

df1 = df1.reset_index('Stats') 
df1 = df1.sort_index(axis=0).set_index('Stats', append=True) 
print (df1) 
           A  B  C  D  E 
Date    Stats           
2006-04-27 23:55:00 SUM  213.46 213.46 19.709 196.80 213.46 
2006-04-28 00:00:00 price 69.62 69.62 6.518 65.09 69.62 
        std  NaN  NaN  NaN  NaN  NaN 
        weight  NaN  NaN  NaN  NaN  NaN 
2006-05-01 00:00:00 price 71.50 71.50 6.522 65.16 71.50 
        std  NaN  NaN  NaN  NaN  NaN 
        weight  NaN  NaN  NaN  NaN  NaN 
2006-05-02 00:00:00 price 72.34 72.34 6.669 66.55 72.34 
        std  NaN  NaN  NaN  NaN  NaN 
        weight  NaN  NaN  NaN  NaN  NaN