Is it required to work on dataframes why can't we use directly csv files.Explain Required to answer. code example

Example: how to set up dataframe from csv

import pandas as pd

column_names = ['sepel lengh', 'sepel width', 'petal lengh', 'petal width', 'class']
iris = pd.read_csv('iris.csv', names=column_names)

print(iris)