code: def ensurearray(*args):
      
      input_is_array = any(isinstance(arg, numpy.ndarray) for arg in args)
      args = numpy.broadcast_arrays(*args)
      args.append(input_is_array)
      return args
docs: Apply numpy's broadcast rules to the given arguments.
  
      This will ensure that all of the arguments are numpy arrays and that they
      all have the same shape. See ``numpy.broadcast_arrays`` for more details.
  
      It also returns a boolean indicating whether any of the inputs were
      originally arrays.
  
      Parameters
      ----------
      *args :
          The arguments to check.
  
      Returns
      -------
      list :
          A list with length ``N+1`` where ``N`` is the number of given
          arguments. The first N values are the input arguments as ``ndarrays``s.
          The last value is a boolean indicating whether any of the
          inputs was an array.