日期偏移
import datetime
from dateutil.relativedelta import relativedelta
def date_add(date, seconds=0, minutes=0, hours=0, days=0, months=0, years=0):
date = date + datetime.timedelta(seconds=seconds, minutes=minutes, hours=hours, days=days)
date = date + relativedelta(months=months)
date = datetime.datetime(year=date.year + years, month=date.month, day=date.day, hour=date.hour,
minute=date.minute, second=date.second)
return date
now = datetime.datetime.now()
date = date_add(now, months=-13)
print(date)
获取月份的第一天和最后一天
import calendar
import datetime
now = datetime.date.today()
this_month_start = datetime.datetime(now.year, now.month, 1)
this_month_end = datetime.datetime(now.year, now.month, calendar.monthrange(now.year, now.month)[1])
print(this_month_start)
print(this_month_end)
