如何合并基于pandas python中特定列的两个数据框？

Question

我必须合并两个dataframes

DF1

company,standard 
 
tata,A1 
 
cts,A2 
 
dell,A3

DF2

company,return 
 
tata,71 
 
dell,78 
 
cts,27 
 
hcl,23

我必须compain既dataframes作为一个数据frame.i需要输出像

company,standard,return 
 
tata,A1,71 
 
cts,A2,27 
 
dell,A3,78

Answer 1

使用merge：

print (pd.merge(df1, df2, on='company')) 

样品：

print (df1) 
    company standard 
0 tata  A1 
1  cts  A2 
2 dell  A3 

print (df2) 
    company return 
0 tata  71 
1 dell  78 
2  cts  27 
3  hcl  23 

print (pd.merge(df1, df2, on='company')) 
    company standard return 
0 tata  A1  71 
1  cts  A2  27 
2 dell  A3  78