old_contents: import sys
  
  
  class Sentinel:
      def __init__(self, name: str):
          self.name = name
  
      def __repr__(self) -> str:
          return f"<{sys.intern(str(self.name)).rsplit('.', 1)[-1]}>"
  
  
  NODATA = Sentinel("NoData")
  NOCONTEXT = Sentinel("NoContext")
  NOID = Sentinel("NoId")
  
new_contents: import sys
  
  
  class Sentinel:
      def __init__(self, name: str):
          self.name = name
  
      def __repr__(self) -> str:
          return f"<{sys.intern(str(self.name)).rsplit('.', 1)[-1]}>"
  
  
  NOCONTEXT = Sentinel("NoContext")
  NODATA = Sentinel("NoData")
  NOID = Sentinel("NoId")
  
subject: Update sentinels.py