合併使用類似列

Question

2數據幀我有2個數據幀列爲遵循

DF

Type  Breed  Common Color Other Color Behaviour 
Golden  Big   Gold   White  Fun  
Corgi  Small   Brown   White  Crazy 
Bulldog Medium   Black   Grey  Strong 

DF2

Type    Breed Behaviour Bark Sound 
Pug    Small  Sleepy   Ak 
German Shepard Big  Cool   Woof 
Puddle   Small  Aggressive  Ek 

我希望通過列Type，Breed和Behavior合併2數據幀。

因此，我的願望輸出將是：

Type   Breed  Behavior 
Golden   Big   Fun 
Corgi   Small  Crazy 
Bulldog   Medium  Strong 
Pug    Small  Sleepy 
German Shepard Big   Cool 
Puddle   Small  Aggressive 

Answer 1

您需要concat：

print (pd.concat([df1[['Type','Breed','Behaviour']], 
        df2[['Type','Breed','Behaviour']]], ignore_index=True)) 

      Type Breed Behaviour 
0   Golden  Big   Fun 
1   Corgi Small  Crazy 
2   Bulldog Medium  Strong 
3    Pug Small  Sleepy 
4 German Shepard  Big  Cool 
5   Puddle Small Aggressive 

更普遍的是使用intersection兩個DataFrames列：

cols = df1.columns.intersection(df2.columns) 
print (cols) 
Index(['Type', 'Breed', 'Behaviour'], dtype='object') 

print (pd.concat([df1[cols], df2[cols]], ignore_index=True)) 
      Type Breed Behaviour 
0   Golden  Big   Fun 
1   Corgi Small  Crazy 
2   Bulldog Medium  Strong 
3    Pug Small  Sleepy 
4 German Shepard  Big  Cool 
5   Puddle Small Aggressive 

比較一般如果df1和df2沒有NaN值使用dropna去除柱與NaN：

print (pd.concat([df1 ,df2], ignore_index=True)) 
    Bark Sound Behaviour Breed Common Color Other Color   Type 
0  NaN   Fun  Big   Gold  White   Golden 
1  NaN  Crazy Small  Brown  White   Corgi 
2  NaN  Strong Medium  Black  Grey   Bulldog 
3   Ak  Sleepy Small   NaN   NaN    Pug 
4  Woof  Cool  Big   NaN   NaN German Shepard 
5   Ek Aggressive Small   NaN   NaN   Puddle    


print (pd.concat([df1 ,df2], ignore_index=True).dropna(1)) 
    Behaviour Breed   Type 
0   Fun  Big   Golden 
1  Crazy Small   Corgi 
2  Strong Medium   Bulldog 
3  Sleepy Small    Pug 
4  Cool  Big German Shepard 
5 Aggressive Small   Puddle 

Answer 2

使用join刪除列不重疊的

df1.T.join(df2.T, lsuffix='_').dropna().T.reset_index(drop=True)