如何从字典中的字典创建子图条形图

import matplotlib.pyplot as plt

data = {
    'A': {'x': 1, 'y': 5},
    'B': {'x': 2, 'y': 7},
    'C': {'x': 3, 'y': 3},
    'D': {'x': 4, 'y': 9}
}

x_data = [value['x'] for value in data.values()]
y_data = [value['y'] for value in data.values()]

plt.bar(range(len(data)), y_data, tick_label=list(data.keys()))
plt.xlabel('X')
plt.ylabel('Y')
plt.title('Subgraph Bar Chart')
plt.show()