old_contents: from buzzfeed_choice import BuzzfeedChoice
  from buzzfeed_choice import BuzzfeedChoice
  from category import Category
  from choice import Choice
  from diagnostic_choice import DiagnosticChoice
  from question import Question
  from range import Range
  from helper import MainHelper
  
new_contents: from buzzfeed_choice import BuzzfeedChoice
  from category import Category
  from choice import Choice
  from diagnostic_choice import DiagnosticChoice
  from question import Question
  from range import Range
  from helper import MainHelper
  
subject: Remove duplicate import from helpers.__init__