datetime.py

from datetime import datetime, timezone, timedelta
import calendar
import time

now = datetime.now()
utc = datetime.utcnow()
>>> now
datetime.datetime(2020, 9, 17, 20, 52, 15, 31149)
>>> utc
datetime.datetime(2020, 9, 17, 11, 52, 15, 215760)

# Before Python3.3 need to use time module or timestamp function after Python3.3
timestamp = int(time.mktime(now.timetuple()))
>>> timestamp
1600343535
>>> int(now.timestamp())
1600343535

timestamp_utc = calendar.timegm(utc.utctimetuple())
>>> timestamp_utc
1600343535

loc = datetime.fromtimestamp(timestamp)
utc = datetime.utcfromtimestamp(timestamp_utc)
>>> loc
datetime.datetime(2020, 9, 17, 20, 52, 15)
>>> utc
datetime.datetime(2020, 9, 17, 11, 52, 15)

>>> int(time.mktime(utc.timetuple()))
1600311135