pandas rename column by index 3f

1df.rename(index={'alpha': 'mu'})

1df.index.names = ['new_name']

1import pandas as pd 
2  
3# Sample DataFrame 
4df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]}) 
5  
6# Changing columns name with index number 
7df.columns.values[0] = "b"
8df.columns.values[1] = "a"
9  
10# Display 
11display(df) 
12