pandas rename index values

                                    df.index.names = ['new_name']

                                    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) 

                                    df.index.name                      # Show me the current name
df.index.name = 'my_column_name'   # Change the index name to my_column_name