Dataframe rename columns

import pandas as pd# Create data frame from csv filedf=pd.read_csv(“e://data/state-population.csv”)# Rename column state/region to state-regionprint(df.rename(columns={‘state/region’:’state-region’}).head(2)) Outputstate-region ages year population0 AL under18 2012 1117489.01 AL total 2012 4817528.0 #Change column names in upper caseprint(df.rename(str.upper,axis=’columns’).head(2)) OutputSTATE/REGION AGES YEAR POPULATION0 AL under18 2012 1117489.01 AL total 2012 4817528.0