Examples

import numpy as np
import pandas as pd

df = pd.DataFrame({'species': ['mammal', 'mammal', 'fish'],
                   'population': [3948, 4000, 6000]},
                  index=['tiger', 'fox', 'shark'])
df

	species	population
tiger	mammal	3948
fox	mammal	4000
shark	fish	6000

for label, content in df.items():
    print('label:', label)
    print('content:', content, sep='\n')

label: species
content:
tiger    mammal
fox      mammal
shark      fish
Name: species, dtype: object
label: population
content:
tiger    3948
fox      4000
shark    6000
Name: population, dtype: int64