修改Matplotlib PatchCollection中的特定补丁

import matplotlib.pyplot as plt
from matplotlib.collections import PatchCollection
from matplotlib.patches import Circle

fig, ax = plt.subplots()
patches = [Circle((0.2, 0.2), 0.1), Circle((0.5, 0.5), 0.2), Circle((0.8, 0.8), 0.3)]
collection = PatchCollection(patches, alpha=0.5)
ax.add_collection(collection)

# 修改第一个补丁的颜色为红色
collection.get_patches()[0].set_facecolor('red')

# 修改第二个补丁的边框样式为虚线
collection.get_patches()[1].set_linestyle('dashed')

plt.show()