Pandas: Rename names of columns and specific labels of the Main Index of MultiIndex dataframe

Last update on April 03 2025 12:52:01 (UTC/GMT +8 hours)

15. Rename Columns and Main Index Labels in MultiIndex DataFrame

Write a Pandas program to rename names of columns and specific labels of the Main Index of the MultiIndex dataframe.

Sample Solution:

Python Code :

import pandas as pd 
import numpy as np
sales_arrays = [['sale1', 'sale1', 'sale2', 'sale2', 'sale3', 'sale3', 'sale4', 'sale4'],
          ['city1', 'city2', 'city1', 'city2', 'city1', 'city2', 'city1', 'city2']]
sales_tuples = list(zip(*sales_arrays))
sales_index = pd.MultiIndex.from_tuples(sales_tuples, names=['sale', 'city'])
print(sales_tuples)
print("\nConstruct a Dataframe using the said MultiIndex levels: ")
df = pd.DataFrame(np.random.randn(8, 5), index=sales_index)
print(df)
print("\nRename the columns name of the said dataframe")
df1 = df.rename(columns={0: "col1", 1: "col2", 2:"col3", 3:"col4", 4:"col5"})
print(df1)
print("\nRename specific labels of the main index of the DataFrame")
df2 = df1.rename(index={"sale2": "S2", "city2": "C2"})
print(df2)

Sample Output:

[('sale1', 'city1'), ('sale1', 'city2'), ('sale2', 'city1'), ('sale2', 'city2'), ('sale3', 'city1'), ('sale3', 'city2'), ('sale4', 'city1'), ('sale4', 'city2')]

Construct a Dataframe using the said MultiIndex levels: 
                    0         1         2         3         4
sale  city                                                   
sale1 city1 -0.846342 -0.741958  1.776873 -0.526789  0.425722
      city2 -1.191729  2.871049  1.334246 -0.555390  0.678033
sale2 city1  1.215433 -0.305873 -0.197025 -1.145550  0.367179
      city2 -1.043111 -0.054862 -0.409382 -0.781236 -1.111498
sale3 city1  0.198136 -0.092846  0.211265 -0.338316 -0.006117
      city2  1.254932  0.660553 -0.343675 -1.488751  1.141144
sale4 city1  0.440996 -1.886134 -1.705170 -0.583568 -0.094108
      city2 -0.645809 -0.979893  0.589839 -0.440143  0.032115

Rename the columns name of the said dataframe
                 col1      col2      col3      col4      col5
sale  city                                                   
sale1 city1 -0.846342 -0.741958  1.776873 -0.526789  0.425722
      city2 -1.191729  2.871049  1.334246 -0.555390  0.678033
sale2 city1  1.215433 -0.305873 -0.197025 -1.145550  0.367179
      city2 -1.043111 -0.054862 -0.409382 -0.781236 -1.111498
sale3 city1  0.198136 -0.092846  0.211265 -0.338316 -0.006117
      city2  1.254932  0.660553 -0.343675 -1.488751  1.141144
sale4 city1  0.440996 -1.886134 -1.705170 -0.583568 -0.094108
      city2 -0.645809 -0.979893  0.589839 -0.440143  0.032115

Rename specific labels of the main index of the DataFrame
                 col1      col2      col3      col4      col5
sale  city                                                   
sale1 city1 -0.846342 -0.741958  1.776873 -0.526789  0.425722
      C2    -1.191729  2.871049  1.334246 -0.555390  0.678033
S2    city1  1.215433 -0.305873 -0.197025 -1.145550  0.367179
      C2    -1.043111 -0.054862 -0.409382 -0.781236 -1.111498
sale3 city1  0.198136 -0.092846  0.211265 -0.338316 -0.006117
      C2     1.254932  0.660553 -0.343675 -1.488751  1.141144
sale4 city1  0.440996 -1.886134 -1.705170 -0.583568 -0.094108
      C2    -0.645809 -0.979893  0.589839 -0.440143  0.032115

For more Practice: Solve these Related Problems:

• Write a Pandas program to rename selected column names and one level of the MultiIndex of a DataFrame and then display the modified DataFrame.
• Write a Pandas program to change the names of the main index labels in a MultiIndex DataFrame and then update the column headers.
• Write a Pandas program to update the names of both columns and the top level of a MultiIndex, using a dictionary mapping for renaming.
• Write a Pandas program to rename specific labels in the main index of a MultiIndex DataFrame and then sort the index.

Python Code Editor:

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