想要显示分类数据的每个条形的值

Question

我已经绘制了用于分类数据的条形图。 现在，我要显示每个条的值。

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

cats = np.array([l for l in "ABCD"], dtype=str)
cats = np.random.choice(cats, 100, p=[0.3, 0.1, 0.4, 0.2])
res = np.random.choice(np.arange(1,7), 100, p=[0.2, 0.1, 0.08, 0.16,0.26,0.2])
df = pd.DataFrame({"Category":cats, "Result":res})
df2 = df.groupby(["Category", "Result"]).size().reset_index(name='Count')
df3 = pd.pivot_table(df2,  values='Count',  columns=['Result'],  index = "Category",aggfunc=np.sum,  fill_value=0)
df4 = pd.pivot_table(df2,  values='Count',  columns=['Category'],  index = "Result",aggfunc=np.sum,  fill_value=0)
fig, ax = plt.subplots(1,2, figsize=(10,4))
df3.plot(kind="bar", ax=ax[0])
df4.plot(kind="bar", ax=ax[1]) 
plt.show()