Python commonly used built-in module --datetime

The datetime class in the datetime module:

Get the current time: datetime.now() current operating system time zone time, date.utctime (UTC time)

Convert to timestamp: timestamp() has nothing to do with the specific time zone

Convert timestamp to datetime: datetime.fromtimestamp()

datetime.utcfromtimestamp

Convert str to datetime: datetime.strptime('2016-10-01 00:030:00','%Y-%m-%d %H:%M:%S')

Convert datetime to str:datetime.strftime（datetime.now(),'%a ,%b %c %H:%M）

Addition and subtraction of dates: datetime.now() + timedelta(days= 1 ,hours =1)

Convert local time to UTC time:

>>> print(datetime.now().replace(tzinfo=timezone(timedelta(hours=8))))
2018-04-17 11:52:09.414200+08:00

Time zone conversion:

We can first utcnow()get the current UTC time and then convert it to any time zone:

>>> utc_dt = datetime.utcnow().replace(tzinfo=timezone.utc)
>>> print(utc_dt)
2018-04-17 03:54:14.380200+00:00
>>> bjutc_dt = utc_dt.astimezone(timezone(timedelta(hours=8)))
>>> bjutc_dt
datetime.datetime(2018, 4, 17, 11, 54, 14, 380200, tzinfo=datetime.timezone(date
time.timedelta(0, 28800)))
>>> print(bjutc_dt)
2018-04-17 11:54:14.380200+08:00