python实现日期判断和加减操作
#==================================================== #时间相关 #==================================================== def if_workday(day_str, separator=""): """ if a day is workday :param day_str: string of a day :param separator: separator of year, month and day, default is empty :return: True: is workday; False: not workday """ spec = "%Y" + separator + "%m" + separator + "%d" day = datetime.strptime(day_str, spec).date() # Monday == 0 ... Sunday == 6 if day.weekday() in [0, 1, 2, 3, 4]: return True else: return False def if_weekend(day_str, separator=""): """ if a day is weekend :param day_str: string of a day :param separator: separator of year, month and day, default is empty :return: True: is weekend; False: not weekend """ spec = "%Y" + separator + "%m" + separator + "%d" day = datetime.strptime(day_str, spec).date() # Monday == 0 ... Sunday == 6 if day.weekday() in [5, 6]: return True else: return False def is_week_lastday(): ''' 判断今天是否为周末,return the day of the week as an integer,Monday is 0 and Sunday is 6 :return: ''' now = (datetime.datetime.utcnow() + datetime.timedelta(hours=8)) # 假如今天是周日 todayIndex = now.weekday() # 如果今天是周日,则返回True if todayIndex == 6: print("todayIndex={},今天是周末...".format(todayIndex)) return True else: print("todayIndex={},今天是周 {},不是周末...".format(todayIndex,int(todayIndex+1))) return False def is_week_whichday(dayIndex=6): ''' 判断今天一周的哪一天,周一为0,周末为6,return the day of the week as an integer,Monday is 0 and Sunday is 6 :return: ''' now = (datetime.datetime.utcnow() + datetime.timedelta(hours=8)) # 假如今天是周日 todayIndex = now.weekday() # 如果今天是周日,则返回True if todayIndex == dayIndex: print("todayIndex={},今天是周 {},不是周 {}...".format(todayIndex, int(todayIndex+1),int(dayIndex+1))) return True else: print("todayIndex={},今天是周 {},不是周 {}...".format(todayIndex,int(todayIndex+1),int(dayIndex+1))) return False def is_month_lastday(): ''' # 判断今天是否为月末 :rwww.cppcns.cometurn: ''' # 获得当月1号的日期 start_date = datetime.date.today().replace(day=1) # 获得当月一共有多少天(也就是最后一天的日期) _, days_in_month = calendar.monthrange(start_date.year, start_date.month) todayIndex = time.strftime("%d", time.localtime()) # 如果今天是周末,返回True if int(todayIndex) == int(days_in_month): print("start_date={},todayIndex={},days_in_month={},今天是月末...".format(start_date,toaRRILdayIndex, days_in_month)) return True else: print("start_date={},todayIndex={},days_in_month={},今天不是月末...".format(start_date,todayIndex , days_in_month)) return False def get_this_week_start(): ''' 获取本周第一天日期 :return: ''' now = datetime.datetime.now() this_week_start = now - timedelta(days=now.weekday()) this_week_end = now + timedelta(days=6 - now.weekday()) print('--- this_week_start = {} this_week_end = {}'.format(this_week_start, this_week_end)) print('--- this_week_start = {} '.format(this_week_start)) return this_week_start def get_this_week_end(): ''' # 获取本周最后一天日期 :return: ''' now = datetime.datetime.now() this_week_start = now - timedelta(days=now.weekday()) this_week_end = now + timedelta(days=6 - now.weekday()) print('--- this_week_start = {} this_week_end = {}'.format(this_week_start, this_week_end)) print('--- this_week_end = {}'.format(this_week_end)) return this_week_end def get_last_month_start(now = datetime.datetime.now()): now = datetime.datetime.strptime(now, "%Y-%m-%d") # 本月第一天和最后一天 this_month_start = datetime.datetime(now.year, now.month, 1) this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) # print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end)) # 上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1)+ datetime.timedelta(hours=23, minutes=59, seconds=59) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) # print('--- last_month_end = {} last_month_start = {}'.format(last_month_end, last_month_start)) print('--- last_month_start = {}'.format(last_month_start)) return last_month_start def get_last_month_end(now = datetime.datetime.now()): now = datetime.datetime.strptime(now, "%Y-%m-%d") # 本月第一天和最后一天 this_month_start = datetime.datetime(now.year, now.month, 1) this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) # print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end)) # 上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) # print('--- last_month_end = {} last_month_start = {}'.format(last_month_end, last_month_start)) print('--- last_month_end = {} '.format(last_month_end)) return last_month_end def get_this_month_start(now = datetime.datetime.now()): now = datetime.datetime.strptime(now, "%Y-%m-%d") # 本月第一天和最后一天 this_month_start = datetime.datetime(now.year, now.month, 1) this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) # print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end)) # 上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) # print('--- last_month_end = {} last_month_start = {}'.format(last_month_end, last_month_start)) print('--- this_month_start = {} '.format(this_month_start)) return this_month_start def get_this_month_end(now = datetime.datetime.now()): now=datetime.datetime.strptime(now, "%Y-%m-%d") # 本月第一天和最后一天 this_month_start = datetime.datetime(now.year, now.month, 1) # this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) if now.month < 12: this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) elif now.month >= 12: this_month_end = datetime.datetime(now.year, now.month , now.day+30) + datetime.timedelta(hours=23, minutes=59, seconds=59) # print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end)) # 上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) # print('--- last_month_end = {} last_month_start = {}'.format(last_month_end, last_month_start)) # print('--- this_month_end = {} '.format(this_month_end)) return str(this_month_end) #从一个时间段获取其中的每一天,可以自定义时间间隔 def get_every_day(start = '2018-01-01',end = '2021-01-01',daysCount=1): ''' 从一个时间段获取其中的每一天,可以自定义时间间隔 :param start: str类型,开始时间,如:'2018-01-01' :param end: str类型,结束时间,如:'2021-01-01' :param daysCount: int类型,每一个时间间隔,默认为1天 :return: ''' datestart = datetime.datetime.strptime(start, '%Y-%m-%d') dateend = datetime.datetime.strptime(end, '%Y-%m-%d') date_list=[] while datestart < dateend: datestart += datetime.timedelta(days=daysCount) date_str=str(datestart.strftime('%Y-%m-%d')) # print('date_str={}'.format(date_str)) date_list.append(date_str) print('date_list={}'.format(date_list)) return date_list #从一个时间段获取其中的每一月,可以自定义时间间隔 def getBetweenEveryMonth(begin_date,end_date): date_list = [] begin_date = datetime.datetime.strptime(begin_date, "%Y-%m-%d") end_date = datetime.datetime.strptime(end_date, "%Y-%m-%d") # end_date = datetime.datetime.strptime(time.strftime('%Y-%m-%d', time.localtime(time.time())), "%Y-%m-%d") while begin_date <= end_date: date_str = begin_date.strftime("%Y-%m-%d") begin_date = add_months_start(begin_date, 1) date_end=get_this_month_end(date_str) date_list.append((date_str+' 00:00:00',date_enhttp://www.cppcns.comd)) print('date_list={}'.format(date_list)) return date_list def add_months_start(dt, months): month = int(dt.month - 1 + months) year = int(dt.year + month / 12) month = int(month % 12 + 1) day = min(dt.day, calendar.monthrange(year, month)[1]) return dt.replace(year=year, month=month, day=day) def add_months_end(dt, months): month = int(dt.month - 1 + months) year = int(dt.year + month / 12) monaRRILth = int(month % 12 + 1) day = max(dt.day, caaRRILlendar.monthrange(year, month)[1]) return dt.replace(year=year, month=month, day=day)
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