python日期处理

 

##当天日期
today = datetime.date.today()
print(today)
##获取当前月的第一天
first = today.replace(day=1)
print(first)
##减一天，得到上个月的最后一天
last_month = first - datetime.timedelta(days=1)
print(last_month)
print(last_month.strftime("%Y%m"))