import datatime
date = datetime.datetime.now()
On the day:
newdate = datetime.datetime.now()
condtions = {'datadate': newdate}
昨天：
newdate = date + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
本周初：
newdate = now - datetime.timedelta(days=now.weekday())
condtions = {'datadate': newdate}
本周末：
newdate = now + datetime.timedelta(days=6 - now.weekday())
condtions = {'datadate': newdate}
上周初：
newdate = now - datetime.timedelta(days=now.weekday() + 7)
condtions = {'datadate': newdate}
上周末：
newdate = now - datetime.timedelta(days=now.weekday() + 1)
condtions = {'datadate': newdate}
At the beginning of the month:
newdate = date.replace(day=1)
condtions = {'datadate': newdate}
At the end of the month:
year = date.year
month = date.month
a, b = calendar.monthrange(year, month) # a,b— —The first day of weekday is the day of the week (0-6 corresponds to Monday to Sunday) and all the days of this month
newdate = datetime.datetime(year=year, month=month, day=b) #Construct datetime
conditions at the end of this month = {'datadate': newdate}
at the end of last month:
date_now = date.replace(day=1)
newdate = date_now + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
at the beginning of last month:
date_now = date. replace(day=1)
date_now = date_now + datetime.timedelta(days=-1)
newdate = datetime.datetime(date_now.year, date_now.month, 1)
conditions = {'datadate': newdate}
年初：
newdate = date.replace(month=1, day=1)
condtions = {'datadate': newdate}
年末：
newdate = date.replace(month=12, day=31)
condtions = {'datadate': newdate}
去年初：
newdate = date.replace(month=1, day=1)
newdate = newdate + datetime.timedelta(days=-1)
newdate = datetime.datetime(newdate.year, 1, 1)
condtions = {'datadate': newdate}
去年末：
newdate = date.replace(month=1, day=1)
newdate = newdate + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
季初：
month = (date.month - 1) - (date.month - 1) % 3 + 1
newdate = datetime.datetime(date.year, month, 1)
condtions = {'datadate':newdate}
end of season:
month = (date.month - 1) - (date.month - 1) % 3 + 1
if month == 10:
newdate = datetime.datetime(date.year + 1, 1, 1) + datetime.timedelta(days=-1)
else:
newdate = datetime.datetime(date.year, month + 3, 1) + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
上季初：
month = (date.month - 1) - (date.month - 1) % 3 + 1
newdate = datetime.datetime(date.year, month, 1)
newdate = newdate + datetime.timedelta(days=-1)
newdate = datetime.datetime(newdate.year, newdate.month - 2, 1)
condtions = {'datadate': newdate}
上季末：
month = (date.month - 1) - (date.month - 1) % 3 + 1 # 10
newdate = datetime.datetime(date.year, month, 1)
newdate = newdate + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
半年初：
month = (date.month - 1) - (date.month - 1) % 6 + 1
newdate = datetime.datetime(date.year, month, 1)
condtions = {'datadate': newdate}
半年末：
month = (date.month - 1) - (date.month - 1) % 6 + 1
if month == 7:
newdate = datetime.datetime(date.year + 1, 1, 1) + datetime.timedelta(days=-1)
else:
newdate = datetime.datetime(date.year, month + 6, 1) + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
上个半年初：
month = (date.month - 1) - (date.month - 1) % 6 + 1
newdate = datetime.datetime(date.year, month, 1)
newdate = newdate + datetime.timedelta(days=-1)
newdate = datetime.datetime(newdate.year, newdate.month - 5, 1)
condtions = {'datadate': newdate}
上个半年末：
month = (date.month - 1) - (date.month - 1) % 6 + 1
newdate = datetime.datetime(date.year, month, 1)
newdate = newdate + datetime.timedelta(days=-1)
condtions = {'datadate': newdate}
月平均值：
ms_newdate = date.replace(day=1)
me_newdate = date
new_date = (ms_newdate, me_newdate)
季平均值：
month = (date.month - 1) - (date.month - 1) % 3 + 1
ss_newdate = datetime.datetime(date.year, month, 1)
se_newdate = date
new_date = (ss_newdate, se_newdate)
半年平均值：
month = (date.month - 1) - (date.month - 1) % 6 + 1
hs_newdate = datetime.datetime(date.year, month, 1)
he_newdate = date
new_date = (hs_newdate, he_newdate)
年均值：
ys_newdate = date.replace(month=1, day=1)
ye_newdate = date
new_date = (ys_newdate, ye_newdate)
if condtions:
query_res = Entry.objects.filter(**condtions).filter().exclude()
if new_date:
query_res = Entry.objects.filter(datadate__range=new_date).filter().exclude()