import datetime now = datetime.datetime.now() #输出:datetime.datetime(2016, 11, 26, 8, 34, 30, 876359)
import time time.time() #输出:1480120686.733905
import time time.localtime() #输出:time.struct_time(tm_year=2016, tm_mon=11, tm_mday=26, tm_hour=8, tm_min=39, tm_sec=33, tm_wday=5, tm_yday=331, tm_isdst=0)
import datetime
datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
'2016-11-26 08:40:39'
import datetime datetime.datetime.now().date() datetime.date(2016, 11, 26)
import datetime datetime.date.today() datetime.date(2016, 11, 26)
import datetime datetime.date.today() + datetime.timedelta(days=1) datetime.date(2016, 11, 27)
import datetime >>> datetime.datetime.now() datetime.datetime(2016, 11, 26, 8, 42, 59, 665368) >>> datetime.datetime.now() - datetime.timedelta(days=3) datetime.datetime(2016, 11, 24, 8, 43, 14, 696948)
import datetime datetime.datetime.combine(datetime.date.today(), datetime.time.min) datetime.datetime(2016, 11, 26, 0, 0) datetime.datetime.combine(datetime.date.today(), datetime.time.max) datetime.datetime(2016, 11, 26, 23, 59, 59, 999999)
import datetime (datetime.datetime(2016,12,13,12,0,0) - datetime.datetime.now()).total_seconds() 1480506.809658
import datetime today = datetime.date.today() #输出: datetime.date(2016, 11, 26) sunday = today + datetime.timedelta(6 - today.weekday()) #输出:datetime.date(2016, 11, 27)
import calendar today = datetime.date.today() last_day_num = calendar.monthrange(today.year, today.month) last_day = datetime.date(today.year, today.month, last_day_num) #输出:datetime.date(2016, 11, 30)
import datetime today = datetime.date.today() first = datetime.date(day=1, month=today.month, year=today.year) lastMonth = first - datetime.timedelta(days=1) #输出:datetime.date(2016, 10, 31)
#当月1号 datetime.date(datetime.date.today().year,datetime.date.today().month,1) #当月1号 datetime.date.today().replace(day=1) #上月1号 (datetime.date.today().replace(day=1) - datetime.timedelta(1)).replace(day=1)
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