Can't run advanced_example_relationships.py file (under `sqlmodel`) in local

[salmantec]

Description:

• Can't be able to run the advanced_example_relationships.py file (under sqlmodel) in my local. getting below error

raise exc.NoInspectionAvailable( sqlalchemy.exc.NoInspectionAvailable: No inspection system is available for object of type <class 'str'>

Code github link:

• Github code

Steps to reproduce:

• Create a new file and copy paste the content from this file
• Run python3 <filename>, you'll see this error