定位即将到期的日期并根据其指定值- Python数据框

import pandas as pd
from datetime import datetime

data = {'日期': ['2022-01-01', '2022-02-01', '2022-03-01', '2022-04-01'],
        '数值': [10, 20, 30, 40]}
df = pd.DataFrame(data)

df['日期'] = pd.to_datetime(df['日期'])

today = datetime.today().date()

expiration_date = today + pd.DateOffset(months=3)  # 假设指定的到期日期为当前日期后3个月
filtered_df = df[df['日期'] <= expiration_date]

print(filtered_df)