Renaming a subset of the columns in a pandas Dataframe

Question

I am trying to rename specific columns in a pandas.DataFrame so I can concat it with a similar dataframe. The code I ran is compiling but it doesn't successfully rename the columns.

df4.rename(columns={"Level1":"PctLevel1","Level2":"PctLevel2","Level3":"PctLevel3","Level4":"PctLevel4"})

Answer 1

You just have to reassign the code to df4 .

df4 = df4.rename(columns={"Level1":"PctLevel1","Level2":"PctLevel2","Level3":"PctLevel3","Level4":"PctLevel4"})