code: def __init__(self):
      self.state = None
  
file_path: sympy/sympy/matrices/utilities.py
imports: from contextlib import contextmanager
  from threading import local
  from sympy.core.function import expand_mul
label_desc: Use image node_id 1 to create a new DotProdSimpState object from inherited base classes: local with example: obj = DotProdSimpState()