import pandas as pd

import matplotlib.pyplot as plt

import seaborn as sns

titanic $=$ pd$.$read$\_$csv$(\text{'}$titanic$.$csv$\text{'})$

first$\_$south $=$ titanic$[($titanic$[\text{'}$Pclass$\text{'}]==1)$ & $($titanic$[\text{'}$Embarked$\text{'}]==\text{'}$S$\text{'})]$

second$\_$third $=$ titanic$[$titanic$[\text{'}$Pclass$\text{'}].$isin$([2,3])]$

sns$.$set$\_$theme$($style$=$'whitegrid', color$\_$codes$=$True$)$

sns$.$barplot$($x$=$'Sex', y$=$'Survived', data$=$first$\_$south, ci$=$None$)$

plt$.$savefig$(\text{'}$bar$\_1.$png$\text{'})$

sns$.$barplot$($x$=$'Pclass', y$=$'Survived', hue$=$'Survived', data$=$second$\_$third, ci$=$None$)$

plt$.$legend$($labels$=[\text{'}0\text{'},\text{'}1\text{'}$

Keep getting the following error:

Traceback $($most recent call last$)$:

File $"/$usr$/$local$/$lib$/$python$3\mathrm{.}10/$dist$-$packages$/$pandas$/$core$/$indexes$/$base$.$py$",$ line $3621,$ in get$\_$loc

return self.$\_$engine.get$\_$loc$($casted$\_$key$)$

File "pandas$/\_$libs$/$index$.$pyx$",$ line $136,$ in pandas.$\_$libs.index.IndexEngine.get$\_$loc

File "pandas$/\_$libs$/$index$.$pyx$",$ line $163,$ in pandas.$\_$libs.index.IndexEngine.get$\_$loc

File "pandas$/\_$libs$/$hashtable$\_$class$\_$helper.pxi", line $5198,$ in pandas.$\_$libs.hashtable.PyObjectHashTable.get$\_$item

File "pandas$/\_$libs$/$hashtable$\_$class$\_$helper.pxi", line $5206,$ in pandas.$\_$libs.hashtable.PyObjectHashTable.get$\_$item

KeyError: 'Pclass'

The above exception was the direct cause of the following exception:

Traceback $($most recent call last$)$:

File $"/$home$/$runner$/$local$/$submission$/$main$.$py$",$ line $5,$ in

first$\_$south $=$ titanic$[($titanic$[\text{'}$Pclass$\text{'}]==1)$ & $($titanic$[\text{'}$Embarked$\text{'}]==\text{'}$S$\text{'})]$

File $"/$usr$/$local$/$lib$/$python$3\mathrm{.}10/$dist$-$packages$/$pandas$/$core$/$frame$.$py$",$ line $3506,$ in $\_\_$getitem$\_\_$

indexer $=$ self.columns.get$\_$loc$($key$)$

File $"/$usr$/$local$/$lib$/$python$3\mathrm{.}10/$dist$-$packages$/$pandas$/$core$/$indexes$/$base$.$py$",$ line $3623,$ in get$\_$loc

raise KeyError$($key$)$ from err

KeyError: 'Pclass'