cattrs

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I can't work out how to obtain a reference to the object instance or field causing a validation error when calling cattrs.structure

For example:

from attrs import define
from cattrs import structure, BaseValidationError 


data = [
   {
    'id': 'aaa',
    'title': 'atitle',
   },
   {
     'XX': 'bbb',
     'title': 'btitle'
   }
]


@define
class Example:
    id: str
    title: str

try:
  example = structure(data, list[Example])
except BaseValidationError as e:
  print(f"Exception: {e}")
  example = None

print(example)

In the example above, one of the list items causes an IterableValidationError (as expected), and within the exception there is a ClassValidationError sub-exception (and KeyErrors within that).

The question is, how do I obtain the instance of the object causing the exception? The reasons for needing this information, is that the dictionary will be decorated with additional metadata (line number information) as the dict is a result from parsing with the ruamel.yaml library. I need to have the object instance causing the error as this will give better error messages in my use-case

thanks