code: def open_without_clobber(name, *args):
      
      fd = None
      count = 1
      orig_name = name
      while fd is None:
          try:
              fd = os.open(name, os.O_CREAT | os.O_EXCL, 0o666)
          except OSError as err:
              if err.errno == errno.EEXIST:
                  name = "%s.%i" % (orig_name, count)
                  count += 1
              else:
                  raise IOError(err.errno, err.strerror, err.filename)
      fobj = open(name, *args)
      if fd != fobj.fileno():
          os.close(fd)
      return fobj
docs: Try to open the given file with the given mode; if that filename exists,
      try "name.1", "name.2", etc. until we find an unused filename.