util functions to translate between aware and naive times with tz change

whoes waves are years

from datetime import datetime
import pytz

tz_utc = pytz.utc
tz_ua = pytz.timezone('Europe/Kiev')


def aware_time_to_naive(t):
    return t.replace(tzinfo=None)


def naive_time_to_aware(t, tz):
    return t.replace(tzinfo=tz)


def aware_time_to_another_tz(t, tz):
    return t.astimezone(tz)


def now_in_ua_naive():
    return aware_time_to_naive(datetime.now(tz_ua))


def ua_naive_to_utc_naive(t):
    return aware_time_to_naive(aware_time_to_another_tz(naive_time_to_aware(t, tz_ua), tz_utc))


def utc_naive_to_ua_naive(t):
    return aware_time_to_naive(aware_time_to_another_tz(naive_time_to_aware(t, tz_utc), tz_ua))