code: def testPeekBadIndex(self):
      stager = data_flow_ops.StagingArea(
          [
              dtypes.int32,
          ],
          shapes=[[10]],
      )
      stager.put([array_ops.zeros([10], dtype=dtypes.int32)])
  
      with self.assertRaisesRegex(
          (ValueError, errors.InvalidArgumentError), "must be scalar"
      ):
          self.evaluate(stager.peek([]))
  
imports: import queue
  import threading
  import numpy
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import data_flow_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 6 for calling the StageTest obj's underlying member method code with example usage: obj.testPeekBadIndex() without return types