code: def handle(self):
      return self.__handle
  
file_path: xlearn/python-package/xlearn/data.py
imports: import os, ctypes
  from numpy import ndarray
  from .base import DataFrame, Series
  import numpy
  from .base import _LIB, XLearnHandle
  from .base import _check_call, c_str
label_desc: Use image node_id 3 for calling the DMatrix obj's underlying member method code with example usage: obj.handle() and returns: self