class_docstr: Mock Class
code: def __getitem__(self, args):
      if self.axis == 1:
          if isinstance(args, str):
              return self._sdf[args]
          elif isinstance(args, (tuple, list)):
              new_df_dict = {k: self._sdf[k] for k in args}
              return SepDataFrame(
                  new_df_dict,
                  join=self.join if self.join in args else args[0],
                  skip_align=True,
              )
          else:
              raise NotImplementedError(
                  f"This type of input is not supported"
              )
      elif self.axis == 0:
          return SepDataFrame(
              {
                  k: df.loc(axis=0)[args]
                  for k, df in self._sdf._df_dict.items()
              },
              join=self.join,
              skip_align=True,
          )
      else:
          df = self._sdf
          if isinstance(args, tuple):
              ax0, *ax1 = args
              if len(ax1) == 0:
                  ax1 = None
              if ax1 is not None:
                  df = df.loc(axis=1)[ax1]
              if ax0 is not None:
                  df = df.loc(axis=0)[ax0]
              return df
          else:
              return df.loc(axis=0)[args]
  
imports: import pandas
  from typing import Dict, Iterable, Union
  import builtins
label_desc: Use image node_id 3 for calling the SDFLoc obj's underlying member method code with example usage: obj.__getitem__(args) and returns: self, SepDataFrame, SepDataFrame, df, df