Rename columns in a Pandas dataframe


import modules

import pandas as pd
import numpy as np
 

create dummy dataframe

raw_data = {'name': ['Willard Morris', 'Al Jennings', 'Omar Mullins', 'Spencer McDaniel'],
'age': [20, 19, 22, 21],
'favorite_color': ['blue', 'red', 'yellow', "green"],
'grade': [88, 92, 95, 70]}
df = pd.DataFrame(raw_data, index = ['Willard Morris', 'Al Jennings', 'Omar Mullins', 'Spencer McDaniel'])
df
age favorite_color grade name
Willard Morris 20 blue 88 Willard Morris
Al Jennings 19 red 92 Al Jennings
Omar Mullins 22 yellow 95 Omar Mullins
Spencer McDaniel 21 green 70 Spencer McDaniel

rename a bunch of columns

df.columns = ['test_age', 'test_favorite_color','test_grade', 'test_name']
df.head()
test_age test_favorite_color test_grade test_name
Willard Morris 20 blue 88 Willard Morris
Al Jennings 19 red 92 Al Jennings
Omar Mullins 22 yellow 95 Omar Mullins
Spencer McDaniel 21 green 70 Spencer McDaniel
 

rename a specific column

df.rename(columns={'age': 'is_just_a_number'}, inplace=True)
df.head()
test_age test_favorite_color test_grade test_name
Willard Morris 20 blue 88 Willard Morris
Al Jennings 19 red 92 Al Jennings
Omar Mullins 22 yellow 95 Omar Mullins
Spencer McDaniel 21 green 70 Spencer McDaniel



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