datetime 模块

datetime  模块

#import datetime
# # datetime.datetime  年月日时分秒
# #
# # datetime.date     年月日
# #
# # datetime.time     时分秒
# #
# # datetime.timedelta    时间差
#
#
#
#
# now=datetime.datetime.now().date()  结果2018-11-21   

# datetime.datetime.now()             结果 2018-11-21 13:33:30.982096

 # date=datetime.date(year=2018,month=11,day=18) 
# print(now-datetime.timedelta(days=1)>date)  结果   True

# print(now - datetime.timedelta(days=1))  结果  2018-11-21    #注释   减号

datetime.timedelta 的部分源码

def __init__(self, days: float = ..., seconds: float = ..., microseconds: float = ...,
             milliseconds: float = ..., minutes: float = ..., hours: float = ...,
             weeks: float = ...) -> None: ...