'Args:
input_tensors (list): list of names.
output_tensors (list): list of names.
return_input (bool): same as :attr:`PredictorBase.return_input`.
sess (tf.Session): the session this predictor runs in. If None,
will use the default session at the first call.'

def __init__(self, input_tensors, output_tensors, return_input=False, sess=None):

    self.return_input = return_input
    self.input_tensors = input_tensors
    self.output_tensors = output_tensors
    self.sess = sess
