content: # -*- coding: utf-8 -*-
  import sys
  
  
  class open_file:
      """
      Context manager that opens a filename and closes it on exit, but does
      nothing for file-like objects.
      """
  
      def __init__(self, filename, *args, **kwargs) -> None:
          self.closing = kwargs.pop("closing", False)
          if filename is None:
              stream = sys.stdout if "w" in args else sys.stdin
              self.fh = open(stream.fileno(), *args, **kwargs)
          elif isinstance(filename, str):
              self.fh = open(filename, *args, **kwargs)
              self.closing = True
          else:
              self.fh = filename
  
      def __enter__(self):
          return self.fh
  
      def __exit__(self, exc_type, exc_val, exc_tb):
          if self.closing:
              self.fh.close()
  
          return False
  