code: def empty(stype, shape, ctx=None, dtype=None):
      
      if isinstance(shape, int):
          shape = (shape, )
      if ctx is None:
          ctx = current_context()
      if dtype is None:
          dtype = mx_real_t
      assert(stype is not None)
      if stype in ('csr', 'row_sparse'):
          return zeros(stype, shape, ctx=ctx, dtype=dtype)
      else:
          raise Exception("unknown stype : " + str(stype))
docs: Returns a new array of given shape and type, without initializing entries.
  
      Parameters
      ----------
      stype: string
          The storage type of the empty array, such as 'row_sparse', 'csr', etc
      shape : int or tuple of int
          The shape of the empty array.
      ctx : Context, optional
          An optional device context (default is the current default context).
      dtype : str or numpy.dtype, optional
          An optional value type (default is `float32`).
  
      Returns
      -------
      CSRNDArray or RowSparseNDArray
          A created array.