code: def __unicode__(self):
      return "%s:unicode" % type(self).__name__
  
imports: import unittest
  import io
  from idlelib.PyShell import PseudoInputFile, PseudoOutputFile
  from test import test_support
label_desc: Use image node_id 2 for calling the Base obj's underlying member method code with example usage: obj.__unicode__() and returns: unknown