from datetime import date

today = datetime.date.today() # 今天
yesterday = today - datetime.timedelta(days=1) # 昨天, 要是前天，把days赋值2
last_month = today.month - 1 if today.month - 1 else 12 # 上个月

time_stamp = time.time() # 当前的时间戳
datetime.datetime.fromtimestamp(time_stamp) # 时间戳转datetime
int(time.mktime(today.timetuple())) # datetime转时间戳
today_str = today.strftime('%Y-%m-%d') # datetime转换字符串
today = datetime.datetime.strptime(today_str, '%Y-%m-%d') # 字符串转datetime
today + datetime.timedelta(hours = 8) # 补时差