  
  try:
      from .preview_tk import PreviewTk as Preview  # noqa
  except ImportError:
      from .preview_cv import PreviewCV as Preview  # noqa
 
</s> remove     from .preview_tk import PreviewTk as Preview  # noqa
 </s> add     from .preview_tk import PreviewTk as Preview </s> remove from .augmentation import ImageAugmentation  # noqa
from .generator import PreviewDataGenerator, TrainingDataGenerator  # noqa
from .preview_cv import PreviewBuffer , TriggerType # noqa
 </s> add from .augmentation import ImageAugmentation
from .generator import PreviewDataGenerator, TrainingDataGenerator
from .preview_cv import PreviewBuffer, TriggerType </s> remove from typing import cast, Dict, Optional, Tuple, TYPE_CHECKING
 </s> add from typing import Dict, Optional, Tuple

from lib.training.preview_tk import PreviewTk </s> remove # TODO Embed this object in GUI
 </s> add 
    from .preview_cv import PreviewCV as Preview
  
  try:
      from .preview_tk import PreviewTk as Preview  # noqa
  except ImportError:
    from .preview_cv import PreviewCV as Preview
keep keep keep keep replace
 GUI - Preview updates
  - Training preview. Embed preview pop-out window
  - Bugfix - convert/extract previews 
lib/training/__init__.py