Python Pandas - 将 PeriodIndex 对象转换为时间戳
要将 PeriodIndex 对象转换为 Timestamp,请使用该方法。PeriodIndex.to_timestamp()
首先,导入所需的库 -
import pandas as pd
创建一个 PeriodIndex 对象 -
periodIndex = pd.PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45','2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y")
显示 PeriodIndex 对象 -
print("PeriodIndex...\n", periodIndex)
将 PeriodIndex 转换为时间戳 -
print("\nPeriodIndex object to timestamp...\n", periodIndex.to_timestamp())
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',
'2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y")
# 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)
# Convert PeriodIndex to timestamp
print("\nPeriodIndex object to timestamp...\n", periodIndex.to_timestamp())
这将产生以下代码 -
PeriodIndex...PeriodIndex(['2021', '2019', '2020', '2022'], dtype='period[A-DEC]')
PeriodIndex frequency object...
<YearEnd: month=12>
PeriodIndex frequency object as a string...
A-DEC
PeriodIndex object to timestamp...
DatetimeIndex(['2021-01-01', '2019-01-01', '2020-01-01', '2022-01-01'], dtype='datetime64[ns]', freq=None)
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