文档：http://labix.org/python-dateutil
pypi: https://pypi.org/project/python-dateutil/
安装
pip install python-dateutil
代码示例
from datetime import datetime, date from dateutil.relativedelta import relativedelta now = datetime.now() print(now) print(now - relativedelta(months=3)) """ 2019-01-09 18:13:28.791192 2018-10-09 18:13:28.791192 """ today = date.today() print(today) print(today - relativedelta(months=3)) """ 2019-01-09 2018-10-09 """
参考：
