Pandas 返回python datetime.time物件中的numpy陣列
要返回python datetime.time 物件的numpy陣列,請在Pandas中使用datetimeindex.time屬性。
首先,匯入所需的庫 -
import pandas as pd
建立一個週期為3,頻率為us(即納秒)的DatetimeIndex。時區為澳大利亞/悉尼 -
datetimeindex = pd.date_range('2021-10-20 02:30:50', periods=3, tz='Australia/Sydney', freq='ns')
顯示DatetimeIndex -
print("DateTimeIndex...\n", datetimeindex)只返回不帶時區資訊的時間戳的時間部分 -
print("\nThe numpy array (time part)..\n",datetimeindex.time)
示例
以下為程式碼 -
import pandas as pd
# DatetimeIndex with period 3 and frequency as us i.e. nanoseconds
# The timezone is Australia/Sydney
datetimeindex = pd.date_range('2021-10-20 02:30:50', periods=3, tz='Australia/Sydney', freq='ns')
# display DateTimeIndex
print("DateTimeIndex...\n", datetimeindex)
# Returns only the date part of Timestamps without timezone information
print("\nThe numpy array (date part)..\n",datetimeindex.date)
# Returns only the time part of Timestamps without timezone information
print("\nThe numpy array (time part)..\n",datetimeindex.time)輸出
以下為程式碼生成結果 -
DateTimeIndex... DatetimeIndex([ '2021-10-20 02:30:50+11:00', '2021-10-20 02:30:50.000000001+11:00', '2021-10-20 02:30:50.000000002+11:00'], dtype='datetime64[ns, Australia/Sydney]', freq='N') The numpy array (date part).. [datetime.date(2021, 10, 20) datetime.date(2021, 10, 20) datetime.date(2021, 10, 20)] The numpy array (time part).. [datetime.time(2, 30, 50) datetime.time(2, 30, 50) datetime.time(2, 30, 50)]
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