Class _LazyRaise

monai/utils/module.py:409–439

        msg += f" ({exception_str})"

    class _LazyRaise:

        def __init__(self, *_args, **_kwargs):
            _default_msg = (
                f"{msg}."
                + "\n\nFor details about installing the optional dependencies, please visit:"
                + "\n    https://monai.readthedocs.io/en/latest/installation.html#installing-the-recommended-dependencies"
            )
            if tb_str:
                _default_msg += f"\n\nOriginal traceback:\n{tb_str}"
            self._exception = OptionalImportError(_default_msg)

        def __getattr__(self, name):
            """
            Raises:
                OptionalImportError: When you call this method.
            """
            raise self._exception

        def __call__(self, *_args, **_kwargs):
            """
            Raises:
                OptionalImportError: When you call this method.
            """
            raise self._exception

        def __getitem__(self, item):
            raise self._exception

        def __iter__(self):
            raise self._exception

    if as_type == "default":
        return _LazyRaise(), False