python - 如何根据 pandas python 中的特定列合并两个数据框？

Question

我必须合并两个数据框:

df1

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

df2

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

我必须将两个数据帧统一为一个数据帧。我需要像这样的输出:

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

Answer 1

使用 merge :

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

示例:

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