python - 有没有办法在 python 中由 causalimpact 生成保存图？

Question

下面是示例代码

import pandas as pd
from causalimpact import CausalImpact
data = pd.read_csv('https://raw.githubusercontent.com/WillianFuks/tfcausalimpact/master/tests/fixtures/arma_data.csv')[['y', 'X']]
data.iloc[70:, 0] += 5

pre_period = [0, 69]
post_period = [70, 99]

ci = CausalImpact(data, pre_period, post_period)
ci.plot()

我想将上面生成的图写入 html 或至少另存为 image 。是否有任何解决方案，因为 ci.plot() 的类型是 nonetype 。 https://github.com/WillianFuks/tfcausalimpact