yes. here we go.
df1:
A      value
xx    20
yy    30

df2:
B      value
xx    40
zz    50

the merging results look like this:
 A      value_x      B        value_y
xx       20            xx       40

any question please ask again.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence