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  • python模块--time & datetime

    time模块

    #获取当前时间的时间戳
    import time 
    >>> time.time()
    1535004894.0959966   
    
    #日期字符串转化成时间戳
    >>> t=time.strptime('201629','%Y%m%d')   #字符串解析成时间元组
    >>> t
    time.struct_time(tm_year=2016, tm_mon=2, tm_mday=9, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=1, tm_yday=40, tm_isdst=-1) 
    >>> time.mktime(t)         #时间元组转化成时间戳
    1454947200.0
    
    #时间戳转化成时间字符串 
    >>> stamp=time.time()
    >>> stamp
    1535001568.6361084
    >>> t_tuple = time.localtime(stamp)           #时间戳转化为时间元组
    >>> t_tuple
    time.struct_time(tm_year=2018, tm_mon=8, tm_mday=23, tm_hour=13, tm_min=19, tm_sec=28, tm_wday=3, tm_yday=235, tm_isdst=0)
    >>>
    >>> time.strftime('%Y%m%d',t_tuple)
    '20180823'
    >>> time.strftime('%Y-%m-%d %H:%M:%S',t_tuple)    #时间元组转化为时间字符串
    '2018-08-23 13:19:28'

    datetime模块

    #获取当前日期和时间
    >>> datetime.datetime.now()
    datetime.datetime(2018, 8, 23, 13, 31, 10, 274590)
    >>> datetime.datetime.now().date()
    datetime.date(2018, 8, 23)
    >>> datetime.date.today()
    datetime.date(2018, 8, 23)
    >>> datetime.datetime.now().time()
    datetime.time(14, 18, 38, 22754)
    
    #日期转换
    #字符串转化成datetime
    >>> datetime.datetime.strptime('20160601','%Y%m%d')
    datetime.datetime(2016, 6, 1, 0, 0)
    >>> datetime.datetime.strptime('201661','%Y%m%d')
    datetime.datetime(2016, 6, 1, 0, 0)
    
    #datetime转化成字符串
    >>> datetime.date.today().strftime('%Y%m%d')
    '20180823'
    >>> datetime.datetime.strftime(datetime.datetime(2016, 6, 1),'%Y%m%d')
    '20160601'
    
    #datetime转化成时间元组
    >>> datetime.date(2016,6,1).timetuple()
    time.struct_time(tm_year=2016, tm_mon=6, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=153, tm_isdst=-1)
     >>> datetime.datetime.now().timetuple()
    time.struct_time(tm_year=2018, tm_mon=8, tm_mday=23, tm_hour=14, tm_min=45, tm_sec=28, tm_wday=3, tm_yday=235, tm_isdst=-1)
    
    #datetime转化成时间戳
    >>> datetime.datetime.now().timestamp()
    1535008475.23429
    >>> datetime.datetime(2018,1,1).timestamp()
    1514736000.0
    
    #时间戳转化成datetime
    >>> datetime.datetime.fromtimestamp(time.time())
    datetime.datetime(2018, 8, 23, 14, 48, 55, 47316)
    >>> datetime.datetime.fromtimestamp(1451577600)
    datetime.datetime(2016, 1, 1, 0, 0)
    
    #日期加减
    >>> datetime.date.today()-datetime.timedelta(days=2)   
    datetime.date(2018, 8, 21)
    >>> datetime.date.today()+datetime.timedelta(days=2)
    datetime.date(2018, 8, 25)
    >>> datetime.date(2017,6,1)+datetime.timedelta(days=2)
    datetime.date(2017, 6, 3)
    
    #替换时间
    >>> datetime.datetime.now()
    datetime.datetime(2018, 8, 23, 14, 55, 9, 312979)
    >>> datetime.datetime.now().replace(day=31,hour=2)
    datetime.datetime(2018, 8, 31, 2, 55, 28, 340220)
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  • 原文地址:https://www.cnblogs.com/xiaobaozi-95/p/9708014.html
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