Python 使用Poetry安装sqlalchemy报错AttributeError解决方法

报错信息：

→   backend poetry add sqlalchemyUsing version ^1.4.23 for SQLAlchemyUpdating dependenciesResolving dependencies... (0.1s)  AttributeError  'EmptyConstraint' object has no attribute 'allows'  at ~/.poetry/lib/poetry/_vendor/py3.8/poetry/core/version/markers.py:291 in validate      287│      288│         if self._name not in environment:      289│             return True      290│    → 291│         return self._constraint.allows(self._parser(environment[self._name]))      292│      293│     def without_extras(self):  # type: () -> MarkerTypes      294│         return self.exclude("extra")      295│→   backend

解决方法

尝试执行下面命令：

poetry self update
poetry update

或者

pip install -U poetry

或者

poetry add sqlalchemy=1.4.22