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)

import pandas as pd

# Sample DataFrame

df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]})

# Changing columns name with index number

su = df.rename(columns={df.columns[1]: 'new'})

# Display

display(su)

import pandas as pd

​

# Create a sample DataFrame

data = {'Index': [1, 2, 3], 'Column1': [4, 5, 6], 'Column2': [7, 8, 9]}

df = pd.DataFrame(data)

​

# Rename the index column

df.index.name = 'NewIndexColumnName'

​

# Print the resulting DataFrame

print(df)