Question $18$

$8pts$

Imagine we create a pandas series using the below code. What is one simple way to retrieve the value $0\mathrm{.}5$ from the series?

import pandas as pd

$df=pd.$ Series

df index $\text{'},\text{'}b\text{'},\text{'}$c$\text{'},\text{'}$d$\text{'}])$

df$[\text{'}$d$\text{'}]$

$\text{'}]$

df$[\text{'}$a$\text{'}]$

$\text{'}]$

df$[\text{'}$loc$\text{'}]$

df$.$find$[\mathrm{.}50]$

df$[$iloc $=\mathrm{.}5]$