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。我们已使用 "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
以下为代码 −
import pandas as pd # Create a PeriodIndex object # PeriodIndex is an immutable ndarray holding ordinal values indicating regular periods in time # 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") # Display PeriodIndex object print("PeriodIndex...\n", periodIndex) # Display PeriodIndex frequency print("\nPeriodIndex frequency...\n", periodIndex.freq) # Display the month number i.e. 1 = January, 2 = February ... 12 = December print("\nMonth number...\n", periodIndex.month)
输出
这会产生以下代码 −
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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