import datetime from datetime import timedelta now = datetime.datetime.now() #今天 today = now #昨天 yesterday = now - timedelta(days=1) #明天 tomorrow = now + timedelta(days=1)<br><br>#当前季度 now_quarter = now.month / 3 if now.month % 3 == 0 else now.month / 3 + 1 #本周第一天和最后一天 this_week_start = now - timedelta(days=now.weekday()) this_week_end = now + timedelta(days=6-now.weekday()) #上周第一天和最后一天 last_week_start = now - timedelta(days=now.weekday()+7) last_week_end = now - timedelta(days=now.weekday()+1) #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) #上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) #本季第一天和最后一天 month = (now.month - 1) - (now.month - 1) % 3 + 1 this_quarter_start = datetime.datetime(now.year, month, 1) this_quarter_end = datetime.datetime(now.year, month + 3, 1) - timedelta(days=1) #上季第一天和最后一天 last_quarter_end = this_quarter_start - timedelta(days=1) last_quarter_start = datetime.datetime(last_quarter_end.year, last_quarter_end.month - 2, 1) #本年第一天和最后一天 this_year_start = datetime.datetime(now.year, 1, 1) this_year_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1) #去年第一天和最后一天 last_year_end = this_year_start - timedelta(days=1) last_year_start = datetime.datetime(last_year_end.year, 1, 1)