# Convert UTC datetime or string of UTC date to local datetime
# phython 3.3+
from datetime import datetime, timezone

time_utc = datetime.strptime(utc_string, "%Y-%m-%d %H:%M:%S")
time = time_utc.replace(tzinfo=timezone.utc).astimezone(tz=None)


# Python 2
import calendar
from datetime import datetime, timedelta

def utc_to_local(utc_dt):
    # get integer timestamp to avoid precision lost
    timestamp = calendar.timegm(utc_dt.timetuple())
    local_dt = datetime.fromtimestamp(timestamp)
    assert utc_dt.resolution >= timedelta(microseconds=1)
    return local_dt.replace(microsecond=utc_dt.microsecond)