Python获取间隔时间段的时间戳数据

import time
import datetime

today = datetime.datetime.now()
# delta = datetime.timedelta(hours=1)
delta = datetime.timedelta(days=7)
start = today - delta
dt = start.strftime("%Y-%m-%d %H:%M:%S")
timeArray = time.strptime(dt, "%Y-%m-%d %H:%M:%S")
startts = int(time.mktime(timeArray)) * 1000000
print(startts)

如果大神们有更好的写法，还望不吝赐教。