Python 时间转换不一致
一个可重复的例子:Python 时间转换不一致,python,pandas,datetime,timezone,Python,Pandas,Datetime,Timezone,一个可重复的例子: import pandas as pd now = pd.Timestamp('2018-04-09 09:10') start_of_today = pd.datetime(now.year, now.month, now.day, 0) print(pd.to_datetime(start_of_today.timestamp(), unit='s')) 最后一行将返回2018-04-08 22:00:00,而不是2018-04-09 00:00,为什么会发生这种情况?
import pandas as pd
now = pd.Timestamp('2018-04-09 09:10')
start_of_today = pd.datetime(now.year, now.month, now.day, 0)
print(pd.to_datetime(start_of_today.timestamp(), unit='s'))
最后一行将返回2018-04-08 22:00:00,而不是2018-04-09 00:00,为什么会发生这种情况?根据
日期时间。时间戳
:
对于aware datetime实例,返回值计算为:
(dt-datetime(1970,1,1,tzinfo=timezone.utc))。总秒数()
因此,您需要将pd.datetime
对象与UTC时区对齐:
from datetime import timezone
import pandas as pd
now = pd.Timestamp('2018-04-09 09:10')
start_of_today = pd.datetime(now.year, now.month, now.day, 0, 0, 0, 0, timezone.utc)
print(pd.to_datetime(start_of_today.timestamp(), unit='s'))
这是因为
它返回(dt-datetime(1970,1,1,tzinfo=timezone.utc)).total_seconds()
时区是utc
你可以看到
In [65]: start_of_today.timestamp()
Out[65]: 1523203200.0
In [66]: pd.Timestamp('2018-04-09 00:00').timestamp()
Out[66]: 1523232000.0
他们的时间戳不同。是时区造成的吗?