how to change the columns of a dataframe in python

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Vanessa
25 Jan 2020
1new_columns = {"col1": "1st", "col2": "2nd"}
2df_new = df.rename(columns=new_columns)
3
4"""
5 col1 | col2 | col3            1st | 2nd | col3
6   a  |   d  |	 g              a  |  d  |  g
7   b  |   e  |   h		=>      b  |  e  |  h
8   c  |   f  |   i              c  |  f  |  i
9"""
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