要将 DateTimeIndex 转换为 Period,请使用Pandas 中的方法。频率是使用freq参数设置的。datetimeindex.to_period()
首先,导入所需的库 -
import pandas as pd
创建一个日期时间索引,周期为 5,频率为 Y,即年份 -
datetimeindex = pd.date_range('2021-10-18 07:20:32.261811624', periods=5, freq='2Y')
显示日期时间索引 -
print("DateTimeIndex...\n", datetimeindex)
将 DateTimeIndex 转换为 Period。我们使用值为“M”的“freq”参数将频率设置为月份 -
print("\nConvert DateTimeIndex to Period...\n", datetimeindex.to_period(freq='M'))
以下是代码 -
import pandas as pd # DatetimeIndex with period 5 and frequency as Y i.e. year # timezone is Australia/Adelaide datetimeindex = pd.date_range('2021-10-18 07:20:32.261811624', periods=5, freq='2Y') # display DateTimeIndex print("DateTimeIndex...\n", datetimeindex) # display DateTimeIndex frequency print("DateTimeIndex frequency...\n", datetimeindex.freq) # Convert DateTimeIndex to Period # We have set the frequency as Month using the "freq" parameter with value 'M' print("\nConvert DateTimeIndex to Period...\n", datetimeindex.to_period(freq='M'))输出结果
这将产生以下代码 -
DateTimeIndex... DatetimeIndex(['2021-12-31 07:20:32.261811624', '2023-12-31 07:20:32.261811624', '2025-12-31 07:20:32.261811624', '2027-12-31 07:20:32.261811624', '2029-12-31 07:20:32.261811624'], dtype='datetime64[ns]', freq='2A-DEC') DateTimeIndex frequency... <2 * YearEnds: month=12> Convert DateTimeIndex to Period... PeriodIndex(['2021-12', '2023-12', '2025-12', '2027-12', '2029-12'], dtype='period[M]')