python 获取今天开始时间戳和周开始时间戳

# 获取今天开始的时间戳
def get_current_day_begin_timestamp():
    time_string = datetime.fromtimestamp(
        time.time()).strftime('%Y-%m-%d 00:00')
    timestamp = time.mktime(datetime.strptime(
        time_string, "%Y-%m-%d 00:00").timetuple())
    return float(timestamp) - 8 * 60 * 60

# 计算这周开始的时间戳
def get_current_week_begin_timestamp():
    date1 = datetime.now()
    this_week_start_dt = str(date1-timedelta(days=date1.weekday())).split()[0]
    timestamp = time.mktime(datetime.strptime(this_week_start_dt, "%Y-%m-%d").timetuple())
    return timestamp - 8 * 60 * 60