- 今天
today = datetime.date.today() - 昨天
yesterday = today - datetime.timedelta(days=1) - 上个月
last_month = today.month - 1 if today.month - 1 else 12 - 当前时间戳
time_stamp = time.time() - 时间戳转datetime
datetime.datetime.fromtimestamp(time_stamp) - datetime转时间戳
int(time.mktime(today.timetuple())) - datetime转字符串
today_str = today.strftime("%Y-%m-%d") - 字符串转datetime
today = datetime.datetime.strptime(today_str, "%Y-%m-%d") - 补时差
today + datetime.timedelta(hours=8)