Python Pandas - 從 PeriodIndex 物件獲取星期


若要從 PeriodIndex 物件獲取星期,請使用 PeriodIndex.weekday 屬性。

首先,匯入所需的庫 −

import pandas as pd

建立一個 PeriodIndex 物件。PeriodIndex 是一個不可變的 NdArray,它包含指示時間中規則週期的序數值 −

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="T")

顯示 PeriodIndex 物件 −

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

從 PeriodIndex 物件顯示星期。星期的用 Monday=0、Tuesday=1 ... Sunday=6 表示 −

print("\nThe day of week from the PeriodIndex object...\n", periodIndex.weekday)

範例

以下為程式碼 −

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

# Display day of the week from the PeriodIndex object
# The day of the week with Monday=0, Tuesday=1 ... Sunday=6
print("\nThe day of week from the PeriodIndex object...\n", periodIndex.weekday)

輸出

這將產生以下程式碼 −

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 week from the PeriodIndex object...
Int64Index([38, 44, 28, 25], dtype='int64')

The day of week from the PeriodIndex object...
Int64Index([5, 2, 3, 5], dtype='int64')

更新時間: 2021 年 10 月 21 日

91 次瀏覽

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