python plt.bar上增加数据标签

Sure, I'd be happy to help you with that! Here is some sample code to add data labels to a bar chart in Python using matplotlib:

import matplotlib.pyplot as plt

x = ['A', 'B', 'C']
y = [1, 2, 3]

fig, ax = plt.subplots()
rects = ax.bar(x, y)

for rect in rects:
    height = rect.get_height()
    ax.annotate(f'{height}', xy=(rect.get_x() + rect.get_width() / 2, height), xytext=(0, 3), textcoords="offset points", ha='center', va='bottom')

plt.show()

This will add the value of each data point above the corresponding bar. I hope this helps!