code: def while_defines_var(x):
      while x > 0:
          y = x + 2
          x -= 1
      return y
  
imports: import itertools
  from absl.testing import parameterized
  import tensorflow
  from tensorflow.python.autograph.tests import reference_test_base
label_desc: Use image node_id 9 for calling a global function with example usage: while_defines_var(x) and returns: y