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')
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