code: def format(self):
      return self.type.format
  
file_path: pytensor/pytensor/sparse/sharedvar.py
imports: import copy
  import scipy.sparse
  from pytensor.compile import shared_constructor
  from pytensor.sparse.basic import SparseTensorType, _sparse_py_operators
  from pytensor.tensor.sharedvar import TensorSharedVariable
label_desc: Use image node_id 1 for calling the SparseTensorSharedVariable obj's underlying member method code with example usage: obj.format() and returns: self