code: def ensure_instance(value, types):
      
      if not isinstance(value, types):
          raise TypeError(
              "expected instance of {}, got {}".format(
                  types, value))
docs: Ensure value is an instance of a certain type
  
      >>> ensure_instance(1, [str])
      Traceback (most recent call last):
      TypeError:
  
      >>> ensure_instance(1, str)
      Traceback (most recent call last):
      TypeError:
  
      >>> ensure_instance(1, int)
      >>> ensure_instance(1, (int, str))
  
      :attr types: Type of list of types