code: def close(self):
          
          # ignore closing a closed file
          if not self._is_open():
              return
  
          # for raw io, all writes are flushed immediately
          if self.allow_update and not self.raw_io:
              self.flush()
              if self._filesystem.is_windows_fs and self._changed:
                  self.file_object.st_mtime = time.time()
          if self._closefd:
              self._filesystem._close_open_file(self.filedes)
          else:
              self._filesystem.open_files[self.filedes].remove(self)
          if self.delete_on_close:
              self._filesystem.remove_object(self.get_object().path)
docs: Close the file.