code: def define_operators(cls, operators):
          
          old_ops = dict(cls._operators)
          for op, func in operators.items():
              cls._operators[op] = func
          yield
          cls._operators = old_ops
docs: Bind operators to specified functions for the scope of the context:
  
          Example
          -------
  
              model = Model()
              other = Model()
              with Model.define_operators({"+": lambda self, other: "plus"}):
                  print(model + other)
                  # "plus"
              print(model + other)
              # Raises TypeError --- binding limited to scope of with block.