code: def get_output(self, *args):
      return script_helper.assert_python_ok("-m", "base64", *args).out
  
imports: import unittest
  import base64
  import binascii
  import os
  from array import array
  from test.support import os_helper
  from test.support import script_helper
label_desc: Use image node_id 2 for calling the TestMain obj's underlying member method code with example usage: obj.get_output() and returns: script_helper