how to get x for countplot code example

Example 1: countplot in pandas

>>> import seaborn as sns
>>> sns.set_theme(style="darkgrid")
>>> titanic = sns.load_dataset("titanic")
>>> ax = sns.countplot(x="class", data=titanic)

Example 2: countplot for different classes in a column

>>> ax = sns.countplot(x="who", data=titanic, palette="Set3")