import re

from datetime import datetime, timezone, timedelta

def to_timestamp(dt_str, tz_str):

#str转换为datetime

dt = datetime.strptime(dt_str, '%Y-%m-%d %H:%M:%S')

#时差正则分组

time_diff_re = re.match('(UTC)(.\d{1,2})',tz_str)

#取时差

time_diff = time_diff_re.group(2)

#设置时区

tz_utc = timezone(timedelta(hours=int(time_diff)))

#根据时区转化时间

dt = dt.replace(tzinfo=tz_utc)

#返回时间戳

return dt.timestamp()