code: def close(self, suppress_warning: bool = False) -> None:
  		
  		if self._file is None:
  			if not suppress_warning:
  				# Warn user that they're being paranoid
  				# and should clean up their code
  				logging.warn("Connection to %s is already closed", self.filename)
  		else:
  			self._file.close()
  			self._file = None
  		self.layers = None  # type: ignore
  		self.ra = None  # type: ignore
  		self.row_attrs = None  # type: ignore
  		self.ca = None  # type: ignore
  		self.col_attrs = None  # type: ignore
  		self.row_graphs = None  # type: ignore
  		self.col_graphs = None  # type: ignore
  		self.shape = (0, 0)
  		self._closed = True
docs: Close the connection. After this, the connection object becomes invalid. Warns user if called after closing.
  
  		Args:
  			suppress_warning:		Suppresses warning message if True (defaults to false)