原创
python3实现提前几月的方式实现
代码实现,岂论若干个月,都可以
def _get_cal_date(self, months):
"""
:param months: 提前月份
:return: 提前月份信息
"""
today = datetime.date.today().strftime("%Y-%m-%d")
cur_year = int(str(today)[0:4])
cur_month = int(str(today)[5:7])
cur_day = str(today)[8:10]
try:
# 最近 months 月数
if cur_month - months == 0:
latest_year = cur_year - 1
latest_month = 12
elif cur_month - months < 0:
year_int = months // 12
months_re = months % 12
if year_int in (0, 1):
latest_year = cur_year - 1
else:
latest_year = cur_year - year_int
if cur_month - months_re == 0:
latest_month = 12
elif cur_month - months_re > 0:
latest_month = cur_month - months_re
else:
latest_month = 12 - (months_re - cur_month)
else:
latest_year = cur_year
latest_month = cur_month - months
# latest_date = calendar.monthrange(year, month)
day = str(latest_year) + '-' + str(latest_month) + '-' + cur_day
day = datetime.datetime.strptime(day, "%Y-%m-%d")
except Exception as e:
_logger.info(f'_get_cal_date :{e}')
return day
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