I am working with a C++ library wrapped for Python.
The library defines classes, each with many attributes that are like Python standard types but with a few extra methods. eg in the Python stubs “String” inherits from the standard “str”

class String(str):
    def get_key(self) -> str:
        """Return the key for this property."""
        ...

and then a class might have attributes of type “String”, eg

class Asset:
    name: String = ''
    ...

The C++ code supports getting and setting these attribute values using regular Python types. So I can do

my_asset.name = 'Foo'
print(my_asset.name)

However Python type-checking (Pylance in this case) doesn’t like the first line above. It says

Cannot assign to attribute “name” for class “Asset”

“str” is incompatible with “String” PylancereportAttributeAccessIssue

(variable) name: str

Is there a way I can modify my Python stubs so that type-checkers will understand that String is compatible with str, not just that in inherits from it?