仅绘制matplot库中datetime对象的时间

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

dates = [
    datetime(2022, 1, 1),
    datetime(2022, 1, 2),
    datetime(2022, 1, 3),
    datetime(2022, 1, 4),
    datetime(2022, 1, 5)
]

values = [5, 10, 8, 12, 6]

fig, ax = plt.subplots()
ax.plot(dates, values)

# 设置x轴的日期格式
ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%m-%d'))

# 设置x轴的刻度间隔
ax.xaxis.set_major_locator(mdates.DayLocator())

# 旋转x轴的日期标签
plt.xticks(rotation=45)

# 添加标题和标签
plt.title('Datetime Plot')
plt.xlabel('Date')
plt.ylabel('Value')

# 显示图表
plt.show()