Python处理时间问题date - datetime - str

简单的运用

#当前日期时间
now = datetime.today()                    #2018-10-11 23:11:22.501561
#now = datetime.now()                     #2018-10-11 23:11:22.501561
now_date =  datetime.today().date()       #2018-10-11
now_time =  datetime.today().time()       #23:10:37.383139

#计算30天后的日期时间
deltatime = timedelta(days=30)
nowAfter30_datetime = (now + deltatime)     #2018-11-10 23:12:02.101730
nowAfter30_date = (now + deltatime).date()  #2018-11-10
 
 
#转化为字符串-str
# str_nowAfter30 = nowAfter30_date.strftime('%Y-%m-%d %H:%M:%S')     #2018-11-10 00:00:00  字符串
str_nowAfter30_ = datetime.strftime(nowAfter30_date,'%Y-%m-%d')      #2018-11-10 00:00:00
 
#str-转为-datetime
datetime_nowAfter30 =  datetime.strptime(str_nowAfter30_, '%Y-%m-%d') #<class 'datetime.datetime'> 2018-11-10 00:00:00
 
#计算两个日期的时间间隔
time = (nowAfter30_datetime - now).days  #30
# time = (nowAfter30_datetime - now)    #30 days, 0:00:00

https://blog.csdn.net/p9bl5bxp/article/details/54945920

https://www.cnblogs.com/sunshineyang/p/6818834.html