pandas как вывести столбец

import pandas as pd

df = pd.read_csv('data.csv')
print(df['column_name'])

import pandas as pd

df = pd.read_csv('data.csv')
print(df.column_name)

import pandas as pd

df = pd.read_csv('data.csv')
print(df.loc[:, 'column_name'])

import pandas as pd

df = pd.read_csv('data.csv')
print(df.iloc[:, column_index])

import pandas as pd

df = pd.read_csv('data.csv')
print(df['column_name'].head())
print(df['column_name'].tail())