docs: def create(self):
          """Exclusively create a file, only if this file previously did not exist.
          """
          fdint = os.open(self.path, (os.O_EXCL |
                                      os.O_CREAT |
                                      os.O_RDWR))
  
          # XXX TODO: 'name' attribute of returned files is not mutable or
          # settable via fdopen, so this file is slighly less functional than the
          # one returned from 'open' by default.  send a patch to Python...
  
          return os.fdopen(fdint, 'w+b')