Python AttributeError: 'training_config' object has no attribute 'pretrained_' - Solution

This error occurs when you try to access an attribute that does not exist in the object. In your case, it seems that you are trying to access an attribute named 'pretrained_' in a 'training_config' object, but this attribute does not exist in the object.

To resolve this error, you need to check the code where you are trying to access this attribute and make sure that the attribute name is spelled correctly and that it actually exists in the object.