Python Pandas - 將 PeriodIndex 物件轉換為時間戳


若要將 PeriodIndex 轉換為時間戳,請使用 PeriodIndex.to_timestamp() 方法。

首先,匯入所需的庫 -

import pandas as pd

建立一個 PeriodIndex 物件 -

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")

顯示 PeriodIndex 物件 -

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

將 PeriodIndex 轉換為時間戳 -

print("\nPeriodIndex object to timestamp...\n", periodIndex.to_timestamp())

示例

以下是程式碼 -

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 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())

輸出

將生成以下程式碼 -

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)

更新於:2021-10-21

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