将pandas数据帧中的多列转换为时间戳-四舍五入到最接近的15分钟间隔

import pandas as pd
import numpy as np

df = pd.DataFrame({
    'date': ['2022-01-01 12:03:00', '2022-01-01 12:17:00', '2022-01-01 12:29:00'],
    'value1': [10, 20, 30],
    'value2': [40, 50, 60]
})

df['date'] = pd.to_datetime(df['date'])

df['rounded_time'] = df['date'].dt.round('15min')

df['rounded_time'] = df['rounded_time'].dt.strftime('%Y-%m-%d %H:%M:%S')