您可以合并sub-DataFrame(仅包含那些列):
df2[list('xab')] # df2 but only with columns x, a, and b
df1.merge(df2[list('xab')])
Python Pandas仅合并某些列
您可以合并sub-DataFrame(仅包含那些列):
df2[list('xab')] # df2 but only with columns x, a, and b
df1.merge(df2[list('xab')])