Python Pandas - 从 PeriodIndex 对象以字符串形式返回频率对象

若要从PeriodIndex对象以字符串形式返回频率对象，请使用PeriodIndex.freqstr属性。

首先，导入所需的库-

import pandas as pd

创建一个PeriodIndex对象。PeriodIndex是一个不可变的ndarray，其中包含指示定期时间段的序数值-

periodIndex = pd.PeriodIndex([2021-09-25 07:50:35, 2019-10-30 04:35:45, 2021-07-15 02:25:15, 2022-06-25 07:20:55], freq="T")

显示PeriodIndex对象-

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

将PeriodIndex频率显示为字符串-

print("\nPeriodIndex frequency object as a string...\n", periodIndex.freqstr)

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 07:50:35, 2019-10-30 04:35:45, 2021-07-15 02:25:15, 2022-06-25 07:20:55], freq="T") #DisplayPeriodIndexobject print("PeriodIndex...\n", periodIndex) #DisplayPeriodIndexfrequency print("\nPeriodIndex frequency object...\n", periodIndex.freq) #DisplayPeriodIndexfrequency as string print("\nPeriodIndex frequency object as a string...\n", periodIndex.freqstr)输出结果

这将产生以下代码-

PeriodIndex... PeriodIndex([2021-09-25 07:50, 2019-10-30 04:35, 2021-07-15 02:25, 2022-06-25 07:20], dtype=period[T]) PeriodIndex frequency object... <Minute> PeriodIndex frequency object as a string... T