class_docstr: DataLoader that supports loading data from file or as provided.
class_docstr_tok: ["DataLoader","that","supports","loading","data","from","file","or","as","provided","."]
code: def __getstate__(self) -> dict:
      # avoid pickling `self._data`
      return {
          k: v
          for k, v in self.__dict__.items()
          if not k.startswith("_")
      }
  
imports: import abc
  import pickle
  from pathlib import Path
  import warnings
  import pandas
  from typing import Tuple, Union, List
  from qlib.data import D
  from qlib.utils import load_dataset, init_instance_by_config, time_to_slc_point
  from qlib.log import get_module_logger
  from qlib.utils.serial import Serializable
label_desc: Use image node_id 2 for calling the StaticDataLoader obj's underlying member method code with example usage: obj.__getstate__() and returns: unknown