original_docstring: 
      A default callback after successful validation of the answer
      This function can return either the actual answer or the original answer,
      given by the user.
      
docstring: A default callback after successful validation of the answer
  This function can return either the actual answer or the original answer,
  given by the user.
docstring_tokens: A default callback after successful validation of the answer This function can return either the actual answer or the original answer given by the user .
code: def default_on_success(question, actual_answer, original_answer):
      '''
      A default callback after successful validation of the answer
      This function can return either the actual answer or the original answer,
      given by the user.
      '''
      sys.stdout.write('%s\n'%actual_answer)
      return actual_answer
code_tokens: def default_on_success ( question , actual_answer , original_answer ) : sys . stdout . write ( '%s\n' % actual_answer ) return actual_answer
short_docstring: A default callback after successful validation of the answer
  This function can return either the actual answer or the original answer,
  given by the user.
short_docstring_tokens: A default callback after successful validation of the answer This function can return either the actual answer or the original answer given by the user .
comment: '''
      A default callback after successful validation of the answer
      This function can return either the actual answer or the original answer,
      given by the user.
      '''