class_docstr: Lazily transformed dataset.
code: def __getitem__(self, idx):
      item = self._data[idx]
      if isinstance(item, tuple):
          return self._fn(*item)
      return self._fn(item)
  
imports: import os
  from ...None import recordio, ndarray
  from ...util import default_array
label_desc: Use image node_id 3 for calling the _LazyTransformDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: self, self