Python Pandas - 从 PeriodIndex 对象获取周期的秒数
要从 PeriodIndex 对象获取周期的秒数,请使用PeriodIndex.second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 07:30:35', '2019-10-30 04:15:45','2021-07-15 02:55:15', '2022-06-25 09:40:55'], freq="S")
显示 PeriodIndex 对象 -
print("PeriodIndex...\n", periodIndex)
显示来自 PeriodIndex 对象的秒数 -
print("\nThe seconds from the PeriodIndex object...\n", periodIndex.second)
示例
以下是代码 -
import pandas as pd输出结果# 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 07:30:35', '2019-10-30 04:15:45',
'2021-07-15 02:55:15', '2022-06-25 09:40:55'], freq="S")
# Display PeriodIndex object
print("PeriodIndex...\n", periodIndex)
# Display PeriodIndex frequency
print("\nPeriodIndex frequency object...\n", periodIndex.freq)
# Display PeriodIndex frequency as string
print("\nPeriodIndex frequency object as a string...\n", periodIndex.freqstr)
# Display seconds from the PeriodIndex object
print("\nThe seconds from the PeriodIndex object...\n", periodIndex.second)
这将产生以下代码 -
PeriodIndex...PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45', '2021-07-15 02:55:15', '2022-06-25 09:40:55'],
dtype='period[S]')
PeriodIndex frequency object...
<Second>
PeriodIndex frequency object as a string...
S
The seconds from the PeriodIndex object...
Int64Index([35, 45, 15, 55], dtype='int64')
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