【2.2】seaborn小提琴图（seaborn-violinplot）

官网：https://seaborn.pydata.org/generated/seaborn.violinplot.html

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案例1

import seaborn as sns
sns.set(style="whitegrid")
tips = sns.load_dataset("tips")
ax = sns.violinplot(x=tips["total_bill"])

Draw a vertical violinplot grouped by a categorical variable:

ax = sns.violinplot(x="day", y="total_bill", data=tips)

Draw a violinplot with nested grouping by two categorical variables:

ax = sns.violinplot(x="day", y="total_bill", hue="smoker",
                data=tips, palette="muted")

Draw split violins to compare the across the hue variable:

ax = sns.violinplot(x="day", y="total_bill", hue="smoker",
                data=tips, palette="muted", split=True)