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

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

$df{[}^{\text{'}}{b}^{\text{'}}]$

$\text{'}]$

$df{[}^{\text{'}}lo{c}^{\text{'}}]$

$]=[\mathrm{.}5$

$\text{'}]$

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