old_contents: from enum import IntFlag
  
  
  class SystemFlag(IntFlag):
      controller = 1
      movement = 2
      graphics = 4
      collision = 8
      logic = 16
      state = 32
  
new_contents: from enum import IntFlag
  
  
  class SystemFlag(IntFlag):
      controller = 1
      movement = 2
      graphics = 4
      collision = 8
      logic = 16
      state = 32
      blood = 64
  
subject: Fix flags bug hasattr returns True if the attribute is None