how to merge two data frames based on particular column in pandas python?

Use merge:

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

Sample:

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

I think we can also use

df1.merge(df2,on='Company')