在matplotlib中更改datetime.time轴的格式

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
from datetime import datetime, time

times = [datetime(2022, 1, 1, 9, 0, 0), datetime(2022, 1, 1, 10, 0, 0), datetime(2022, 1, 1, 11, 0, 0)]
values = [10, 20, 30]

fig, ax = plt.subplots()

x = mdates.date2num(times)

ax.plot(x, values)

ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M:%S'))

ax.xaxis.set_major_locator(mdates.HourLocator(interval=1))

plt.show()