时区感知的datetime对象，不像datetime.utcnow():

from datetime import datetime,timezone
now_utc = datetime.now(timezone.utc)

从Unix纪元开始的时间戳，单位为毫秒:

datetime.now(timezone.utc).timestamp() * 1000

时区感知的datetime对象，不像datetime.utcnow():

from datetime import datetime,timezone
now_utc = datetime.now(timezone.utc)

从Unix纪元开始的时间戳，单位为毫秒:

datetime.now(timezone.utc).timestamp() * 1000

你可以使用datetime库获取UTC时间甚至是本地时间。

import datetime

utc_time = datetime.datetime.utcnow() 
print(utc_time.strftime('%Y%m%d %H%M%S'))

时区感知，零外部依赖:

from datetime import datetime, timezone

def utc_now():
    return datetime.utcnow().replace(tzinfo=timezone.utc)

import datetime
import pytz

# datetime object with timezone awareness:
datetime.datetime.now(tz=pytz.utc)

# seconds from epoch:
datetime.datetime.now(tz=pytz.utc).timestamp() 

# ms from epoch:
int(datetime.datetime.now(tz=pytz.utc).timestamp() * 1000) 

为了正确，UTC格式至少需要T字母:

>>> a=(datetime.datetime.now(timezone.utc))
>>> a.strftime("%Y-%m-%dT%H:%M:%SZ")
'2022-11-28T16:42:17Z'