[Bug]: cannot import name 'Spec' from 'openapi_core' version 0.23.1 #1225

Actual Behavior

It is impossible to import Spec from openapi_core installed with pip.

Traceback (most recent call last):
   <Package that calls Spec>
    from openapi_core import Spec
ImportError: cannot import name 'Spec' from 'openapi_core' (/opt/anaconda3/envs/native/lib/python3.13/site-packages/openapi_core/__init__.py)

Expected Behavior

There should be no error.

Steps to Reproduce

pip install openapi-core, then run a python script with from openapi_core import Spec.

OpenAPI Core Version

0.23.1

OpenAPI Core Integration

Don't know

Affected Area(s)

importing in another program

References

No response

Anything else we need to know?

No response

Would you like to implement a fix?

None