Python Pandas - 从 PeriodIndex 对象返回频率对象

要从PeriodIndex对象返回频率对象，请使用PeriodIndex.freq属性。

首先，导入所需的库-

import pandas as pd

创建一个PeriodIndex对象。我们使用“freq”参数设置了频率-

periodIndex = pd.PeriodIndex([2021-09-25, 2019-10-30, 2020-11-20, 2021-07-15, 2022-06-12, 2023-07-10], freq="D")

显示PeriodIndex对象-

print("PeriodIndex...\n", periodIndex)

显示PeriodIndex频率-

print("\nPeriodIndex frequency...\n", periodIndex.freq)

示例

以下是代码-

import pandas as pd #CreateaPeriodIndexobject #PeriodIndexisanimmutablendarrayholdingordinalvaluesindicatingregularperiodsintime # We have set the frequency using the "freq" parameter periodIndex = pd.PeriodIndex([2021-09-25, 2019-10-30, 2020-11-20, 2021-07-15, 2022-06-12, 2023-07-10], freq="D") #DisplayPeriodIndexobject print("PeriodIndex...\n", periodIndex) #DisplayPeriodIndexfrequency print("\nPeriodIndex frequency...\n", periodIndex.freq) #Displaythemonthnumberi.e.1=January,2=February...12=December print("\nMonth number...\n", periodIndex.month)输出结果

这将产生以下代码-

PeriodIndex... PeriodIndex([2021-09-25, 2019-10-30, 2020-11-20, 2021-07-15, 2022-06-12, 2023-07-10], dtype=period[D]) PeriodIndex frequency... <Day> Month number... Int64Index([9, 10, 11, 7, 6, 7], dtype=int64)