code: def test_nested_multi_value_assign(self):
      def test_function(a, b, c):
          x, y = a, a + b
          (z, y), x = (c, y + b), x + a
          return z, (y, x)
  
      def expected_result(a, b, c):
          tmp_1001 = a + b
          x, y = a, tmp_1001
          tmp_1002 = y + b
          tmp_1003 = (c, tmp_1002)
          tmp_1004 = x + a
          (z, y), x = tmp_1003, tmp_1004
          tmp_1005 = y, x
          tmp_1006 = z, tmp_1005
          return tmp_1006
  
      self.assert_body_anfs_as_expected(expected_result, test_function)
  
imports: import textwrap
  import gast
  from tensorflow.python.autograph.pyct import loader
  from tensorflow.python.autograph.pyct import parser
  from tensorflow.python.autograph.pyct import transformer
  from tensorflow.python.autograph.pyct.common_transformers import anf
  from tensorflow.python.platform import test
label_desc: Use image node_id 7 for calling the AnfTransformerTest obj's underlying member method code with example usage: obj.test_nested_multi_value_assign() and returns: z,  y,  x, tmp_1006