Arulkumar03/Fox_Sheep_Detector_Computer_Vision_model

1# Copyright (c) Facebook, Inc. and its affiliates.2 3from typing import Any4import pydoc5from fvcore.common.registry import Registry  # for backward compatibility.6 7"""8``Registry`` and `locate` provide ways to map a string (typically found9in config files) to callable objects.10"""11 12__all__ = ["Registry", "locate"]13 14 15def _convert_target_to_string(t: Any) -> str:16    """17    Inverse of ``locate()``.18 19    Args:20        t: any object with ``__module__`` and ``__qualname__``21    """22    module, qualname = t.__module__, t.__qualname__23 24    # Compress the path to this object, e.g. ``module.submodule._impl.class``25    # may become ``module.submodule.class``, if the later also resolves to the same26    # object. This simplifies the string, and also is less affected by moving the27    # class implementation.28    module_parts = module.split(".")29    for k in range(1, len(module_parts)):30        prefix = ".".join(module_parts[:k])31        candidate = f"{prefix}.{qualname}"32        try:33            if locate(candidate) is t:34                return candidate35        except ImportError:36            pass37    return f"{module}.{qualname}"38 39 40def locate(name: str) -> Any:41    """42    Locate and return an object ``x`` using an input string ``{x.__module__}.{x.__qualname__}``,43    such as "module.submodule.class_name".44 45    Raise Exception if it cannot be found.46    """47    obj = pydoc.locate(name)48 49    # Some cases (e.g. torch.optim.sgd.SGD) not handled correctly50    # by pydoc.locate. Try a private function from hydra.51    if obj is None:52        try:53            # from hydra.utils import get_method - will print many errors54            from hydra.utils import _locate55        except ImportError as e:56            raise ImportError(f"Cannot dynamically locate object {name}!") from e57        else:58            obj = _locate(name)  # it raises if fails59 60    return obj61