Python3 日期相关

import datetime
import time

#获取当前日期，格式化
date0=datetime.date.today().strftime('%Y%m%d %H:%M:%S')
print(date0)#只有年月日 例如：20180927 00:00:00
date1=datetime.datetime.today().strftime('%Y-%m-%d %H:%M:%S')
print(date1) #例如：2018-09-27 15:21:46
date2=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
print(date2)#例如：2018-09-27 15:21:46

#日期减N天
print(datetime.date(2018,9,22)-datetime.timedelta(days=3) ) #某个日期前三天日期

#时间戳，转为日期，然后再格式化
timeStamp = 1381419600
dateArray = datetime.datetime.utcfromtimestamp(timeStamp) #时间戳，转为日期
print(dateArray.strftime('%Y%m%d-%H%M%S'))

#获取时间戳
print(time.time())#原始时间时间戳
print(int(time.time()))#秒级时间戳
print(int(round(time.time()*1000))) #毫秒级时间戳


#将指定时间设置为秒级时间戳
dt = '2019-01-01 10:40:30'
ts = int(time.mktime(time.strptime(dt, "%Y-%m-%d %H:%M:%S")))
print (ts)

#将任意格式日期转为元组
timeArray = time.strptime('1999-10-12 12:09:23', "%Y-%m-%d %H:%M:%S")
print(timeArray)#time.struct_time(tm_year=1999, tm_mon=10, tm_mday=12, tm_hour=12, tm_min=9, tm_sec=23, tm_wday=1, tm_yday=285, tm_isdst=-1)

#简写方式
otherStyleTime = time.strftime("%F %A %a", timeArray)
print(otherStyleTime)

#例如：获取任意日期上周一到周五
def lastWeekDays(date): #'yyyy-MM-dd'
    list=[]
    if date:
        dateArray=time.strptime(date,'%Y-%m-%d')
        weekDay=dateArray.tm_wday+1#当前日期星期几
        print(weekDay)
        #上周日日期
        date=datetime.date(year=dateArray.tm_year,month=dateArray.tm_mon,day=dateArray.tm_mday)
        # print('上周日：%s'% (date -datetime.timedelta(days=(weekDay))))
        # print('上周六：%s' % (date - datetime.timedelta(days=(weekDay+1))))
        # print('上周五：%s' % (date - datetime.timedelta(days=(weekDay +2))))
        # print('上周四：%s' % (date - datetime.timedelta(days=(weekDay + 3))))
        # print('上周三：%s' % (date - datetime.timedelta(days=(weekDay + 4))))
        # print('上周二：%s' % (date - datetime.timedelta(days=(weekDay + 5))))
        # print('上周一：%s' % (date - datetime.timedelta(days=(weekDay + 5))))
        date=date - datetime.timedelta(days=(weekDay)) #上周日
        list.append(date)
        for i in range(1,7,1):
            date=date-datetime.timedelta(1)#上周六..周一
            list.append(date)
        list.reverse();
        return list

#调用上面方法
days=lastWeekDays('2018-09-20')
for i in days:
    print(i)