rename column pandas without index code example

Example 1: rename columns pandas

df.rename(columns={'oldName1': 'newName1',
                   'oldName2': 'newName2'},
          inplace=True, errors='raise')
# Make sure you set inplace to True if you want the change
# to be applied to the dataframe

Example 2: pandas rename column by index?

import pandas as pd 
  
# Sample DataFrame 
df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]}) 
  
# Changing columns name with index number 
df.columns.values[0] = "b"
df.columns.values[1] = "a"
  
# Display 
display(df)