Python 如何在matplotlib中将条形图上的附加值绘制为线段？

我有一个Python条形图，我想在上面绘制一些其他值（例如，表示平均值）作为段

考虑以下绘制简单条形图的代码：

import matplotlib.pyplot as plt

h = plt.bar([0,1,2], [4,5,6],width=0.5)
plt.legend((h,), ("vals",))
plt.show()

这将绘制下图：

对于每个条，我都有一个平均值，我想在相应条上绘制为一个线段。所需的绘图如下所示：

如何在

matplotlib

中将条形图上的值绘制为线段？

这如何

import matplotlib.pyplot as plt

indices = [0, 1, 2]
values = [4, 5, 6]
averages = [3.5, 5.5, 4.75]
pad = 0.3

fig, ax = plt.subplots()

b = ax.bar(indices, values, width=0.5, label='vals')

for index, average in zip(indices, averages):
    l = ax.plot([index - pad, index + pad], [average, average], color='red')

ax.legend([b, l[0]], ['vals', 'avg'])

这个怎么样

import matplotlib.pyplot as plt

indices = [0, 1, 2]
values = [4, 5, 6]
averages = [3.5, 5.5, 4.75]
pad = 0.3

fig, ax = plt.subplots()

b = ax.bar(indices, values, width=0.5, label='vals')

for index, average in zip(indices, averages):
    l = ax.plot([index - pad, index + pad], [average, average], color='red')

ax.legend([b, l[0]], ['vals', 'avg'])