将xtick标签从熊猫图更改为不同的日期格式

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

data = {'日期': ['2022-01-01', '2022-01-02', '2022-01-03', '2022-01-04', '2022-01-05'],
        '数值': [10, 15, 7, 12, 9]}
df = pd.DataFrame(data)

df['日期'] = pd.to_datetime(df['日期'])

plt.plot(df['日期'], df['数值'])

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

plt.gca().xaxis.set_major_locator(mdates.DayLocator(interval=2))

plt.show()