code: def RunTestPartialRunMissingPlaceholderFeedException(self, sess):
      x = array_ops.placeholder(dtypes.float32, shape=())
      fetches = [x * 2, x * 3]
      handle = sess.partial_run_setup(fetches=fetches, feeds=[])
      with self.assertRaisesRegex(
          errors.InvalidArgumentError,
          "You must feed a value for placeholder",
      ):
          sess.partial_run(handle, fetches[0])
  
imports: from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import googletest
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 6 for calling the PartialRunTest obj's underlying member method code with example usage: obj.RunTestPartialRunMissingPlaceholderFeedException(sess) without return types