Python Pandas - 从具有特定时间序列频率的 DateTimeIndex 中提取星期几
要从具有特定时间序列频率的 DateTimeIndex 中提取星期几,请使用 **DateTimeIndex.dayofweek** 属性。
首先,导入所需的库:
import pandas as pd
创建一个周期为 6,频率为 D(即天)的 DatetimeIndex:
datetimeindex = pd.date_range('2021-10-20 02:30:50', periods=6, tz='Australia/Sydney', freq='3D')
显示 DateTimeIndex 频率:
print("DateTimeIndex frequency...\n", datetimeindex.freq)
获取星期几。假设一周从星期一开始,用 0 表示,星期天用 6 表示:
print("\nGet the day of week..\n",datetimeindex.dayofweek)
示例
以下是代码:
import pandas as pd # DatetimeIndex with period 6 and frequency as D i.e. day # The timezone is Australia/Sydney datetimeindex = pd.date_range('2021-10-20 02:30:50', periods=6, tz='Australia/Sydney', freq='3D') # display DateTimeIndex print("DateTimeIndex...\n", datetimeindex) # display DateTimeIndex frequency print("DateTimeIndex frequency...\n", datetimeindex.freq) # Get the day of week # It is assumed the week starts on Monday, # which is denoted by 0 and ends on Sunday which is denoted by 6 print("\nGet the day of week..\n",datetimeindex.dayofweek)
输出
这将产生以下代码:
DateTimeIndex... DatetimeIndex(['2021-10-20 02:30:50+11:00', '2021-10-23 02:30:50+11:00', '2021-10-26 02:30:50+11:00', '2021-10-29 02:30:50+11:00', '2021-11-01 02:30:50+11:00', '2021-11-04 02:30:50+11:00'], dtype='datetime64[ns, Australia/Sydney]', freq='3D') DateTimeIndex frequency... <3 * Days> Get the day of week.. Int64Index([2, 5, 1, 4, 0, 3], dtype='int64')
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