code: def _DataFrame__dir__(self):
      # Column names that are string identifiers are added to the dir of the
      # DataFrame
      # See https://github.com/pandas-dev/pandas/blob/43691a2f5d235b08f0f3aa813d8fdcb7c4ce1e47/pandas/core/indexes/base.py#L878  # noqa: E501
      _pd_df_dir = dir(pd.DataFrame)
      return _pd_df_dir + [
          colname
          for colname in self.columns
          if isinstance(colname, str) and colname.isidentifier()
      ]
  
imports: import copyreg
  import pickle
  import sys
  import pandas
  import cudf
  from ..annotation import nvtx
  from ..fast_slow_proxy import _CUDF_PANDAS_NVTX_COLORS, _DELETE, _fast_slow_function_call, _FastSlowAttribute, _FunctionProxy, _Unusable, get_final_type_map, make_final_proxy_type, make_intermediate_proxy_type, register_proxy_func
  from .common import array_function_method, array_method, arrow_array_method, cuda_array_interface, custom_iter
  from pandas.io.sas.sas7bdat import SAS7BDATReader
  from pandas.io.sas.sas_xport import XportReader
  from pandas.core.resample import Resampler, TimeGrouper
label_desc: Use image node_id 3 for calling a global function with example usage: _DataFrame__dir__() and returns: unknown