TAADpapers的工具包用到的lru是lru-dict

安装lru时报错详情：

(textattack-master) G:\xxx\TextAttack-master>pip install lru
Collecting lru
  Using cached lru-0.1.tar.gz (1.1 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [9 lines of output]
      Traceback (most recent call last):
        File "", line 36, in <module>
        File "", line 34, in <module>
        File "C:\Users\user\AppData\Local\Temp\pip-install-ol85bcqc\lru_2da420766b1d47d693126f3791a2d882\setup.py", line 2, in <module>
          from lru import __version__ as version
        File "C:\Users\user\AppData\Local\Temp\pip-install-ol85bcqc\lru_2da420766b1d47d693126f3791a2d882\lru.py", line 18
          raise KeyError, key
                        ^
      SyntaxError: invalid syntax
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

TextAttackTextAttack: A Framework for Adversarial Attacks, Data Augmentation, and Adversarial Training in NLP. John Morris, Eli Lifland, Jin Yong Yoo, Jake Grigsby, Di Jin, Yanjun Qi. EMNLP 2020 Demo. [website] [doc] [pdf]