code: def RunTestPartialRunAlreadyFed(self, sess):
      a = array_ops.placeholder(dtypes.float32, shape=[])
      b = array_ops.placeholder(dtypes.float32, shape=[])
      c = array_ops.placeholder(dtypes.float32, shape=[])
      r1 = math_ops.add(a, b)
      r2 = math_ops.multiply(a, c)
  
      h = sess.partial_run_setup([r1, r2], [a, b, c])
      sess.partial_run(h, r1, feed_dict={a: 1, b: 2})
      with self.assertRaisesRegex(
          errors.InvalidArgumentError, "has already been fed.$"
      ):
          sess.partial_run(h, r2, feed_dict={a: 1, c: 3})
  
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 9 for calling the PartialRunTest obj's underlying member method code with example usage: obj.RunTestPartialRunAlreadyFed(sess) without return types