如何创建由二进制类分隔的数据列表的小提琴图？

Question

我想要展示一个人们年龄的小提琴情节，每个都属于0级或1级。我创建了一个年龄列表，以及一个与班级对应的单独列表。我可以为单个列表绘制小提琴图，但是如何绘制1级和0级分离的年龄分布？

import numpy as np
import seaborn as sns
import csv
import matplotlib.pyplot as plt

    reader = csv.reader(file)

    ages = []
    class = []

    #Here we populate our list with data from our csv
    for column in reader:
        ages.append(column[3])
        class.append(column[0])

    #Here we can initialize Figure and Axes object
    fig, ax = plt.subplots()

    #Here we create our violin plot for the age distribution
    ax.violinplot(ages, vert=False)

    #
    # Here we need to add code to plot age distribution seperated by class
    #

    #Here we show our violin plot
    plt.show()