class_docstr: Class for sparse matrix.
class_docstr_tok: ["Class","for","sparse","matrix","."]
code: def __repr__(self):
      return _sparse_matrix_str(self)
  
imports: from typing import Optional, Tuple
  import torch
label_desc: Use image node_id 2 for calling the SparseMatrix obj's underlying member method code with example usage: obj.__repr__() and returns: _sparse_matrix_str