Python Pandas - 從 PeriodIndex 物件中獲取年份


要從 PeriodIndex 物件獲取年份,請使用 PeriodIndex.year 屬性。

首先,匯入所需的庫 -

import pandas as pd

建立一個 PeriodIndex 物件。我們使用“freq”引數設定頻率 -

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="T")

顯示 PeriodIndex 物件 -

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

顯示 PeriodIndex 頻率 -

print("\nPeriodIndex frequency object...\n", periodIndex.freq)

從 PeriodIndex 物件顯示年份 -

print("\nThe year from the PeriodIndex object...\n", periodIndex.year)

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',
'2021-07-15 02:55:15', '2022-06-25 09:40:55'], freq="T")

# 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 year from the PeriodIndex object
print("\nThe year from the PeriodIndex object...\n", periodIndex.year)

輸出

將生成以下程式碼 -

PeriodIndex...
PeriodIndex(['2021-09-25 07:30', '2019-10-30 04:15', '2021-07-15 02:55', '2022-06-25 09:40'],
dtype='period[T]')

PeriodIndex frequency object...
<Minute>

PeriodIndex frequency object as a string...
T

The year from the PeriodIndex object...
Int64Index([2021, 2019, 2021, 2022], dtype='int64')

更新於: 2021-10-21

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