Pandas 返回python datetime.time对象中的numpy数组


要返回python datetime.time 对象的numpy数组,请在Pandas中使用datetimeindex.time属性。

首先,导入所需的库 -

import pandas as pd

创建一个周期为3,频率为us(即纳秒)的DatetimeIndex。时区为澳大利亚/悉尼 -

datetimeindex = pd.date_range('2021-10-20 02:30:50', periods=3, tz='Australia/Sydney', freq='ns')

显示DatetimeIndex -

print("DateTimeIndex...\n", datetimeindex)

只返回不带时区信息的时间戳的时间部分 -

print("\nThe numpy array (time part)..\n",datetimeindex.time)

示例

以下为代码 -

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)

输出

以下为代码生成结果 -

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)]

更新时间: 2021年10月18日

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