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

change order of the columns

#now 'age' will appear at the end of our df
df = df[['favorite_color','grade','name','age']]
df.head()

	favorite_color	grade	name	age
Willard Morris	blue	88	Willard Morris	20
Al Jennings	red	92	Al Jennings	19
Omar Mullins	yellow	95	Omar Mullins	22
Spencer McDaniel	green	70	Spencer McDaniel	21