要在 DateTimeIndex 中返回一天中特定时间值的索引位置,请使用该方法。DateTimeIndex.indexer_at_time()
首先,导入所需的库 -
import pandas as pd
创建日期时间索引,周期为 5,频率为 T 即分钟 -
datetimeindex = pd.date_range('2021-10-30 02:30:50', periods=5, tz='Australia/Adelaide', freq='20T')
显示日期时间索引 -
print("DateTimeIndex...\n", datetimeindex)
在一天中的特定时间显示值的索引位置,即此处的 03:10:50 -
print("\nIndex locations of values at particular time of day...\n", datetimeindex.indexer_at_time('2021-10-30 03:10:50'))
以下是代码 -
import pandas as pd # DatetimeIndex with period 5 and frequency as T i.e. minutes # The timezone is Australia/Adelaide datetimeindex = pd.date_range('2021-10-30 02:30:50', periods=5, tz='Australia/Adelaide', freq='20T') # display DateTimeIndex print("DateTimeIndex...\n", datetimeindex) # display DateTimeIndex frequency print("\nDateTimeIndex frequency...\n", datetimeindex.freq) # display index locations of values at particular time of day i.e. 03:10:50 here print("\nIndex locations of values at particular time of day...\n", datetimeindex.indexer_at_time('2021-10-30 03:10:50'))输出结果
这将产生以下代码 -
DateTimeIndex... DatetimeIndex(['2021-10-30 02:30:50+10:30', '2021-10-30 02:50:50+10:30', '2021-10-30 03:10:50+10:30', '2021-10-30 03:30:50+10:30', '2021-10-30 03:50:50+10:30'], dtype='datetime64[ns, Australia/Adelaide]', freq='20T') DateTimeIndex frequency... <20 * Minutes> Index locations of values at particular time of day... [2]