code: def test_live_out_except_variable(self):
      def test_fn(x, a):
          try:
              pass
          except a as b:
              raise b
          return x
  
      node = self._parse_and_analyze(test_fn)
      fn_body = node.body
  
      # Note: 'a' is not live because there is no raise statement inside the
      # try, and we discount the possibility of other code in the try block
      # raising an error.
      self.assertHasLiveIn(fn_body[0], ("b", "x"))
  
imports: from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.autograph.pyct import cfg
  from tensorflow.python.autograph.pyct import naming
  from tensorflow.python.autograph.pyct import parser
  from tensorflow.python.autograph.pyct import qual_names
  from tensorflow.python.autograph.pyct import transformer
  from tensorflow.python.autograph.pyct.static_analysis import activity
  from tensorflow.python.autograph.pyct.static_analysis import liveness
  from tensorflow.python.autograph.pyct.static_analysis import reaching_fndefs
  from tensorflow.python.platform import test
label_desc: Use image node_id 17 for calling the LivenessAnalyzerTest obj's underlying member method code with example usage: obj.test_live_out_except_variable() and returns: x