如何在python中绘制X轴日期等值线图

import matplotlib.pyplot as plt
import matplotlib.dates as mdates

dates = ['2022-01-01', '2022-01-02', '2022-01-03', '2022-01-04', '2022-01-05']
values = [10, 15, 12, 8, 20]

dates = [datetime.datetime.strptime(date, "%Y-%m-%d").date() for date in dates]

fig, ax = plt.subplots()

ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))

ax.plot(dates, values)

plt.xticks(rotation=45)

plt.show()