Get Nth row

import numpy as np
import pandas as pd
df = pd.read_csv('data1.csv')
df
capacity score length
0 1 10 30
1 2 20 30
2 3 30 40
3 3 40 30
4 2 30 40
5 7 10 23
6 3 20 22
7 8 20 11
8 2 30 2 
df[2:4]
capacity score length
2 3 30 40
3 3 40 30 
# It will return 3 and 4th row