Answers for "Which parameter of the merge() function specifies the type of join to be performed on the dataframes?"

merge two columns name in one header pandas

df['A'] = df[a_cols].apply(' '.join, axis=1)

Posted by: Guest on August-17-2020

merge dataframe pandas

>>> df1.merge(df2, left_on='lkey', right_on='rkey')
  lkey  value_x rkey  value_y
0  foo        1  foo        5
1  foo        1  foo        8
2  foo        5  foo        5
3  foo        5  foo        8
4  bar        2  bar        6
5  baz        3  baz        7

Posted by: Guest on October-11-2020

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