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Link to this sectionReference for ultralytics/models/__init__.py#

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Summary

Link to this sectionFunction ultralytics.models.__getattr__#

def __getattr__(name)

Lazy-import SAM so standard YOLO imports don't load optional torchvision internals.

Args

NameTypeDescriptionDefault
namerequired
Source code in ultralytics/models/__init__.py

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def __getattr__(name):
    """Lazy-import SAM so standard YOLO imports don't load optional torchvision internals."""
    if name == "SAM":
        # Scoped for import ultralytics speed: SAM pulls optional torchvision-heavy modules.
        from .sam import SAM

        return SAM
    raise AttributeError(f"module {__name__} has no attribute {name}")



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