import datetime
import time

'''
datetime模块包含的类
    date  日期
    time  时间
    datetime    日期时间
    timedelta   时间间隔
    tzinfo      时区
'''

'''
datetime.date(year, month, day)
    获取日期对象
'''
date_obj = datetime.date(2020, 4, 1)
print(type(date_obj))       # <class 'datetime.date'>
'''
datetime.date.fromtimestamp(seconds)
    根据时间戳获去日期对象
'''
time_stamp = time.time()
print(datetime.date.fromtimestamp(time_stamp))      # 2020-04-01
'''
datetime.date.replace(year, month, day)
    替换原来的date对象并生成一个新的date对象
'''
date1 = datetime.date(2019, 4, 1)
date2 = date1.replace(2020, 4, 1)
print(date2)        # 2020-04-01
'''
datetime.date.timetuple()
    返回date对应的时间元组
'''
date = datetime.date(2020, 4, 1)
print(date.timetuple())
# time.struct_time(tm_year=2020, tm_mon=4, tm_mday=1, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=2, tm_yday=92, tm_isdst=-1)
'''
datetime.date.weekday()
    返回date是星期几，从0开始，星期一为0
'''
today = datetime.date.today()
print(today.weekday())
'''
datetime.date.isoweekday()
    返回date是星期几，从1开始，星期一是1
'''
today = datetime.date.today()
print(today.isoweekday())       # 3
'''
datetime.date.isocalendar()
    返回年，一年中的第几周和一周中的第几天(从1开始，星期一为1)
'''
today = datetime.date.today()
print(today.isocalendar())      # (2020, 14, 3)
'''
datetime.date.isoformat()
    返回日期的标准格式字符串
'''
print(datetime.date.today().isoformat())        # 2020-04-01

'''
datetime.time(hour,minute,second,microsecond,tzinfo)
    hour---小时
    minute---分
    second---秒
    microsecond---微妙，百万分之一秒
    tzinfo---时区信息
'''
time_ = datetime.time(14,36,30,500)
print(time_)  # 14:36:30.000500
print(time_.hour)       # 14
print(time_.minute)     # 36
print(time_.second)     # 30
print(time_.microsecond)    # 500
print(time_.tzinfo)     # None
'''
datetime.time.replace(hour, minute, second, microsecond)
    替换原来的time生成一个新的time
'''
time1 = datetime.time(10, 15, 36, 7000)
time2 = time1.replace(12, 16, 27, 4000)
print(time2)  # 12:16:27.004000
'''
datetime.time.isoformat()
    返回标准的时间字符串
'''
time_ = datetime.time(14, 46, 36, 100)
print(time_.isoformat())        # 14:46:36.000100
'''
datetime.time.strftime(format)
    返回一个定制的时间字符串
'''
time_ = datetime.time(14, 49, 50)
print(time_.strftime('%H:%M:%S'))       # 14:49:50


'''
datetime.datetime(year,month,day,hour,minute,second,microsecond)
'''
date_time = datetime.datetime(2020,4,1,14,51,30,4111)
print(date_time)        # 2020-04-01 14:51:30.004111
'''
datetime.datetime.today()
    获取当前的日期时间对象
'''
print(datetime.datetime.today())        # 2020-04-01 14:52:41.644794
'''
datetime.datetime.now(tz=None)
    返回当前的日期时间对象，可以接收tz(时区参数),如果不指定参数，则结果和datetime.datetime.today()一样

'''
print(datetime.datetime.now())      # 2020-04-01 14:54:59.362091
'''
datetime.datetime.utcnow()
    返回格林威治日期时间对象
'''
print(datetime.datetime.utcnow())   # 2020-04-01 06:56:06.057328
'''
datetime.datetime.fromtimestamp(seconds)
    将时间戳转化为日期时间对象
'''
print(datetime.datetime.fromtimestamp(time.time()))     # 2020-04-01 14:59:04.920301
'''
datetime.datetime.isoformat(sep='T')
    返回标准格式的日期时间字符串，sep为分割符,默认为T
'''
print(datetime.datetime.today().isoformat(sep=' '))     # 2020-04-01 15:01:28.531929
'''
datetime.datetime.ctime()
    返回本地表示的时间
'''
print(datetime.datetime.today().ctime())        # Wed Apr  1 15:02:41 2020
'''
datetime.datetime.strftime(format)
    将日期时间对象转化为定制的日期时间字符串
'''
print(datetime.datetime.today().strftime('%Y-%m-%d %H:%M:%S'))      # 2020-04-01 15:04:38
'''
datetime.datetime.strptime(date_string, format)
    将定制的日期时间字符串转化为日期时间对象
    date_string为日期时间字符串
    format为定制的格式
'''
print(datetime.datetime.strptime('2020-4-1 15:07:30', '%Y-%m-%d %H:%M:%S'))     # 2020-04-01 15:07:30
'''
datetime.datetime.combine(date, time)
    将date对象和时间对象合并成一个datetime对象
'''
date_ = datetime.date.today()
time_ = datetime.time(15, 10, 30)
print(datetime.datetime.combine(date_, time_))      # 2020-04-01 15:10:30
'''
datetime.datetime.timetuple()
    将datetime对象转化为时间元组
'''
date_time = datetime.datetime.today()
print(date_time.timetuple())
# time.struct_time(tm_year=2020, tm_mon=4, tm_mday=1, tm_hour=15, tm_min=11, tm_sec=49, tm_wday=2, tm_yday=92, tm_isdst=-1)
'''
datetime.datetime.utctimetuple()
    将datetime对象转化为utc标准的时间元组
'''
date_time = datetime.datetime.today()
print(date_time.utctimetuple())
# time.struct_time(tm_year=2020, tm_mon=4, tm_mday=1, tm_hour=15, tm_min=13, tm_sec=24, tm_wday=2, tm_yday=92, tm_isdst=0)
'''
datetime.datetime.toordinal()
    计算datetime是从0001-01-01开始算起的第几天
'''
print(datetime.datetime.today().toordinal())        # 737516
'''
datetime.datetime.weekday()
    返回datetime对象是星期几,从0开始，星期一是0
'''
print(datetime.datetime.today().weekday())      # 2
'''
datetime.datetime.isocalendar()
    返回datetime对象的年份，一年的第几天，一周的第几天,结果为元组
'''
print(datetime.datetime.today().isocalendar())      # (2020, 14, 3)


'''
datetime.timedelta(days, seconds, microseconds, milliseconds, minutes, hours, weeks)
'''
time_delta = datetime.timedelta(days=5, minutes=3)
print(time_delta)       # 5 days, 0:03:00
'''
利用timedelta对datetime对象进行计算
'''
today = datetime.datetime.today()
time_delta = datetime.timedelta(days=30, hours=5, minutes=4)
future_day = today + time_delta
print(future_day)       # 2020-05-01 20:27:16.940289
datetime1 = datetime.datetime(2020, 4, 1, 14, 26, 48)
datetime2 = datetime.datetime(2019, 4, 1, 19, 35, 37)
time_delta = datetime1 - datetime2
print(time_delta)           # 365 days, 18:51:11