Time parsing and conversion in Python

time.py

from datetime import datetime
from pytz import timezone
from dateutil.parser import parse

def get_unix_time(time_string, tz_name):
    # parse the time input (without timezone)
    ts = parse(time_string)

    # localize to the specified timezone
    tz = timezone(tz_name)
    ts = tz.localize(ts)

    return int(ts.timestamp())


ts = get_unix_time('21.11.2019 15:30', 'Europe/Berlin')
print(ts)

local = datetime.utcfromtimestamp(int(ts))
local = timezone('UTC').localize(local)
local = local.astimezone(timezone('Europe/Berlin'))
print(local)