具體代碼如下所示：

# 時(shí)間的替換import time,datetimetoday = datetime.datetime.today()print(’當(dāng)前時(shí)間：’,today)print(’當(dāng)前時(shí)間轉(zhuǎn)換成整h整m整s:’,today.replace(minute=0, second=0))# 時(shí)間的加減res1 = today + datetime.timedelta(days=1,minutes=60)print(’增加的時(shí)間為res:’,res1)res0 = datetime.datetime.now()print(’未格式化時(shí)間res0：’,res0)# 將時(shí)間轉(zhuǎn)字符串格式化res2 = datetime.datetime.now().strftime('%Y/%m/%d')print(’格式化后的時(shí)間res:’,res2)# 字符串轉(zhuǎn)時(shí)間res3 = datetime.datetime.strptime(’2018/10/11’, '%Y/%m/%d')print(’字符串轉(zhuǎn)特定的時(shí)間res：’,res3) # 轉(zhuǎn)成時(shí)間元組print(’轉(zhuǎn)成時(shí)間元組:’,today.timetuple())#日期0000時(shí)間格式轉(zhuǎn)換為普通時(shí)間格式str_time =’2018-12-14 00:00:00’start_date = datetime.datetime.strptime(str_time, '%Y-%m-%d %H:%M:%S')print(’start_date:’,start_date)print(’---------第二部分----------’)from datetime import datetimefrom datetime import timedelta# 1) 獲取當(dāng)前日期和時(shí)間today = datetime.today() # 返回當(dāng)前時(shí)間時(shí)分秒都為0print(’當(dāng)前today:’,today)today1 = datetime.now() # 返回當(dāng)前日期和時(shí)間# now.hour # 時(shí)# now.minute # 分# now.isoweekday（）# 返回的1-7代表周一--周日；# now.weekday（）# 返回的0-6代表周一--到周日# 而標(biāo)準(zhǔn)格式種%w 1-6表示周一--周六，0代表周日print(’today1’, today1 )today2 = datetime.utcnow() # 返回當(dāng)前東八區(qū)時(shí)間就是比當(dāng)時(shí)時(shí)間少8個(gè)小時(shí)print(’today2:’,today2)# 2) 獲取指定日期和時(shí)間,加減計(jì)算time= datetime(2019, 5, 12, 12, 13, 14)d= time + timedelta(weeks=0, days=0, hours=0, minutes=0, seconds=0, milliseconds=0, microseconds=0, )#依次為 '周' '天', '時(shí)','分','秒','毫秒','微秒'print(’time:’,time)print(’d:’,d)time1= '2019-5-12 12:13:14'# 字符串 日期d1 = datetime.strptime(str(time1),’%Y-%m-%d %H:%M:%S’)plus= d1 + timedelta(days=1)# 加minus = d1 - timedelta(days=1)# 減print(’d1:’,d1)print(’plus:’,plus)print(’minus:’,minus)time2= 20190512121314d2 = datetime.strptime(str(time2),’%Y%m%d%H%M%S’)delta = d2 + timedelta(days=1)print(’time2:’,time2)print(’d2:’,d2 )print(’delta:’,delta)# 3) 日期datetime-timestamp 時(shí)間戳相互轉(zhuǎn)now_stamp = time.timestamp()print(’指定時(shí)間對(duì)應(yīng)時(shí)間戳 :’, now_stamp)print(’對(duì)應(yīng)本地時(shí)間 :’, datetime.fromtimestamp(now_stamp ))print(’UTC標(biāo)準(zhǔn)時(shí)間 :’, datetime.utcfromtimestamp(now_stamp ))print(’本周的第幾天:’, datetime.fromtimestamp(now_stamp ).weekday())# 4) datetime 時(shí)間 轉(zhuǎn)換為str字符串now = datetime.now()print(’當(dāng)前時(shí)間的的:’, now)print(’轉(zhuǎn)換為str字符串:’,now.strftime(’%Y%m%d%H%M%S’))print(’--------第三部分-------------’)import datetimefrom datetime import timedeltanow = datetime.datetime.now()print(’now:’,now)# 今天today = nowprint(’today:’,today)# 昨天yesterday = now - timedelta(days=1)print(’yesterday:’,yesterday)# 明天tomorrow = now + timedelta(days=1)print(’tomorrow:’,tomorrow)# 當(dāng)前季度now_quarter = now.month / 3 if now.month % 3 == 0 else now.month / 3 + 1print(’now_quarter:’,now_quarter)# 本周第一天和最后一天this_week_start = now - timedelta(days=now.weekday())this_week_end = now + timedelta(days=6 - now.weekday())print(’this_week_start:’,this_week_start)print(’this_week_end:’,this_week_end)# 上周第一天和最后一天last_week_start = now - timedelta(days=now.weekday() + 7)last_week_end = now - timedelta(days=now.weekday() + 1)print(’last_week_start:’,last_week_start)print(’last_week_end:’,last_week_end)# 本月第一天和最后一天this_month_start = datetime.datetime(now.year, now.month, 1)month = now.month + 1if month == 13: month = 1 year = now.year + 1 this_month_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1) print(’this_month_end:’,this_month_end )else: this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) print(’this_month_end:’,this_month_end )# 上月第一天和最后一天last_month_end = this_month_start - timedelta(days=1)last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1)print(’last_month_end:’,last_month_end)print(’last_month_start:’,last_month_start)# 本季第一天和最后一天month = (now.month - 1) - (now.month - 1) % 3 + 1this_quarter_start = datetime.datetime(now.year, month, 1)this_quarter_end = datetime.datetime(now.year, month + 3, 1) - timedelta(days=1)print(’this_quarter_start:’,this_quarter_start)print(’this_quarter_end:’,this_quarter_end)# 上季第一天和最后一天last_quarter_end = this_quarter_start - timedelta(days=1)last_quarter_start = datetime.datetime(last_quarter_end.year, last_quarter_end.month - 2, 1)print(’last_quarter_end:’,last_quarter_end)print(’last_quarter_start:’,last_quarter_start)# 本年第一天和最后一天this_year_start = datetime.datetime(now.year, 1, 1)this_year_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1)print(’this_year_start:’,this_year_start)print(’this_year_end:’,this_year_end)# 去年第一天和最后一天last_year_end = this_year_start - timedelta(days=1)last_year_start = datetime.datetime(last_year_end.year, 1, 1)print(’last_year_end:’,last_year_end)print(’last_year_start:’,last_year_start)

打印結(jié)果如下：

總結(jié)

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