code: def initialize_variables(testcase):
      """Handle global variable initialization in TF 1.X.
  
      Arguments:
        testcase: instance of tf.test.TestCase
      """
      if (
          hasattr(tf, "global_variables_initializer")
          and not tf.executing_eagerly()
      ):
          testcase.evaluate(tf.global_variables_initializer())
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
label_desc: Use image node_id 2 for calling a global function with example usage: initialize_variables(testcase) without return types