Method install_member

lib/sqlalchemy/orm/instrumentation.py:445–452

(self, key: str, implementation: Any)

        delattr(self.class_, key)

    def install_member(self, key: str, implementation: Any) -> None:
        if key in (self.STATE_ATTR, self.MANAGER_ATTR):
            raise KeyError(
                "%r: requested attribute name conflicts with "
                "instrumentation attribute of the same name." % key
            )
        self.originals.setdefault(key, self.class_.__dict__.get(key, DEL_ATTR))
        setattr(self.class_, key, implementation)

    def uninstall_member(self, key: str) -> None:
        original = self.originals.pop(key, None)