@JohanC建议，你可以用Pandas来自动完成：

import pandas as pd
import matplotlib.pyplot as plt

df = pd.DataFrame(
    {
        "private": [1, 1, 3],
        "public": [8, 12, 5],
    }
)

fig, ax = plt.subplots()
df.T.plot(kind="bar", rot=0, ax=ax)

plt.show()