# -*- codinh: utf-8 -*-

from datetime import datetime,timedelta,timezone
import re

def to_timestamp(dt_str,tz_str):
    now = datetime.strptime(dt_str,"%Y-%m-%d %H:%M:%S")
    dt_utc = re.match(r'^UTC([+|-]\d+):00$',tz_str)
    now_swich = timezone(timedelta(hours=int(dt_utc.group(1))))
    X = now.replace(tzinfo=now_swich)
    return X.timestamp()


t1 = to_timestamp('2015-6-1 08:10:30', 'UTC+7:00')
assert t1 == 1433121030.0, t1

t2 = to_timestamp('2015-5-31 16:10:30', 'UTC-09:00')
assert t2 == 1433121030.0, t2

print('Pass')