def get_time(self):
year = datetime.date.today().year
month = datetime.date.today().month
firstDayWeekDay, monthRange = calendar.monthrange(year, month)
start = str(datetime.date(year= year, month= month, day=1))
end = str(datetime.date(year=year, month=month, day=monthRange))
return (time.mktime(time.strptime(str(start),'%Y-%m-%d')),
time.mktime(time.strptime(str(end),'%Y-%m-%d')))
获取当月第一天和最后一天的datetime格式以及时间戳格式，参考
