您可以通过

You can accomplish something like this with TypeEngine.with_variant:

from sqlalchemy.types import PickleType
from sqlalchemy.dialects import postgresql

HybridType = PickleType()

HybridType = HybridType.with_variant(postgresql.HSTORE(), 'postgresql')

这会创建一个新类型HybridType，您可以像使用其他任何类型一样使用它，但要注意的是它将在Postgres上生成一个HSTORE列，并在其他任何地方生成一个PickleType.

This creates a new type, HybridType, which you can use like any other type, with the caveat that it will produce an HSTORE column on Postgres and a PickleType everywhere else.