code: def c_handle_array(objs):
      
      arr = (ctypes.c_void_p * len(objs))()
      arr[:] = [o.handle for o in objs]
      return arr
docs: Create ctypes const void ** from a list of MXNet objects with handles.
  
      Parameters
      ----------
      objs : list of NDArray/Symbol.
          MXNet objects.
  
      Returns
      -------
      (ctypes.c_void_p * len(objs))
          A void ** pointer that can be passed to C API.