code: def testInvalidInput(self):
      with self.assertRaisesRegex(
          (ValueError, errors.InvalidArgumentError),
          "at least rank 1 but is rank 0",
      ):
          nn_ops.nth_element(5, 0)
  
      # Test with placeholders
      with ops.Graph().as_default():
          with self.session(use_gpu=False):
              v = array_ops.placeholder(dtype=dtypes.int32)
              with self.assertRaisesOpError(
                  "at least rank 1 but is rank 0"
              ):
                  nn_ops.nth_element(v, 0).eval(feed_dict={v: 5})
  
imports: import numpy
  from tensorflow.python.eager import backprop
  from tensorflow.python.eager import context
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import nn_ops
  import tensorflow.python.ops.nn_grad
  from tensorflow.python.platform import test
label_desc: Use image node_id 11 for calling the NthElementTest obj's underlying member method code with example usage: obj.testInvalidInput() without return types