问题描述
我试图让我的头脑围绕datetime模块。我知道现在的时间是一个时代,一个事件发生的时间(作为一个时代)。我需要做的是弄清楚这个事件是否在昨天午夜到午夜之间发生。 t = time.time() #现在是
t2 = 1234567890#从我的日志中的某些任意时间
24小时前是t - 86400,但是我怎么能把它上下颠倒到午夜。我遇到了一个方法来获取时间戳进出日期时间,然后操纵datetime来设置时间。
p>生成最后一个午夜很容易:
from datetime import datetime,date,time
午夜= datetime.combine(date.today(),time.min)
结合了今天的日期,一起 time.min
在午夜时间形成 datetime
对象。
使用 timedelta()
您可以计算以前的 午夜:
from datetime import timedelta
yesterday_midnight =午夜 - timedelta(days = 1)
现在你需要做的是测试你的时间戳记是否在这两点之间:
timestamp = datetime.fromtimestamp(some_timestamp_from_y my_log)
if yesterday_midnight< = timestamp<午夜:
#这发生在00:00:00和23:59:59之间
组合成一个函数:
from datetime import datetime,date,time,timedelta
def is_yesterday (timestamp):
midnight = datetime.combine(date.today(),time.min)
yesterday_midnight =午夜 - timedelta(days = 1)
timestamp = datetime.fromtimestamp(some_timestamp_from_your_log)
return yesterday_midnight< = timestamp<午夜:
I'm trying to get my head around the datetime module. I know the time now as an epoch and the time an event last happened (as an epoch time). What I need to do is figure out whether that event happened between midnight and midnight of yesterday.
t = time.time() # is now
t2 = 1234567890 # some arbitrary time from my log
24 hours ago is t - 86400, but how can I round that up and down to midnight. I'm having real trouble finding a way to get timestamps in and out of datetime or then manipulating a datetime to set the time.
Generating the last midnight is easy:
from datetime import datetime, date, time
midnight = datetime.combine(date.today(), time.min)
That combines today's date, together with time.min
to form a datetime
object at midnight.
With a timedelta()
you can calculate the previous midnight:
from datetime import timedelta
yesterday_midnight = midnight - timedelta(days=1)
Now all you need to do is test if your timestamp is in between these two points:
timestamp = datetime.fromtimestamp(some_timestamp_from_your_log)
if yesterday_midnight <= timestamp < midnight:
# this happened between 00:00:00 and 23:59:59 yesterday
Combined into one function:
from datetime import datetime, date, time, timedelta
def is_yesterday(timestamp):
midnight = datetime.combine(date.today(), time.min)
yesterday_midnight = midnight - timedelta(days=1)
timestamp = datetime.fromtimestamp(some_timestamp_from_your_log)
return yesterday_midnight <= timestamp < midnight:
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