How to paraphrase string using NLTK in python

Question

我正在尝试编写一个 API，该 API 返回给定数量的原始字符串的释义变体，用户将其作为参数传递给 GET 请求。该字符串作为解析树传递。用户还应该能够指定响应中的行数，但这是可选的（默认 20 行）。

原串：

The charming Gothic Quarter, or Barri Gòtic, has narrow medieval streets filled with trendy bars, clubs and Catalan restaurants.

查询示例：

localhost:<port>/paraphrase?tree=(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP
Quarter) ) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic) ) ) (, ,) (VP (VBZ has) (NP (NP
(JJ narrow) (JJ medieval) (NNS streets) ) (VP (VBN filled) (PP (IN with) (NP (NP (JJ
trendy) (NNS bars) ) (, ,) (NP (NNS clubs) ) (CC and) (NP (JJ Catalan) (NNS
restaurants) ) ) ) ) ) ) )

字符串示例：

(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP
Quarter) ) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic) ) ) (, ,) (VP (VBZ has) (NP (NP
(JJ narrow) (JJ medieval) (NNS streets) ) (VP (VBN filled) (PP (IN with) (NP (NP (JJ
trendy) (NNS bars) ) (, ,) (NP (NNS clubs) ) (CC and) (NP (JJ Catalan) (NNS
restaurants) ) ) ) ) ) ) )

API 应返回带有字符串变体的 JSON 响应。

例子：

{
    "paraphrases": [
        {
            "tree": "(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP Quarter)) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic))) (, ,) (VP (VBZ has) (NP (NP (JJ narrow) (JJ medieval) (NNS streets)) (VP (VBN filled) (PP (IN with) (NP (NP (NNS clubs)) (, ,) (NP (JJ trendy) (NNS bars)) (CC and) (NP (JJ Catalan) (NNS restaurants))))))))"
        },
        {
            "tree": "(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP Quarter)) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic))) (, ,) (VP (VBZ has) (NP (NP (JJ narrow) (JJ medieval) (NNS streets)) (VP (VBN filled) (PP (IN with) (NP (NP (JJ trendy) (NNS bars)) (, ,) (NP (JJ Catalan) (NNS restaurants)) (CC and) (NP (NNS clubs))))))))"
        },
        {
            "tree": "(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP Quarter)) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic))) (, ,) (VP (VBZ has) (NP (NP (JJ narrow) (JJ medieval) (NNS streets)) (VP (VBN filled) (PP (IN with) (NP (NP (JJ Catalan) (NNS restaurants)) (, ,) (NP (NNS clubs)) (CC and) (NP (JJ trendy) (NNS bars))))))))"
        },
        {
            "tree": "(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP Quarter)) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic))) (, ,) (VP (VBZ has) (NP (NP (JJ narrow) (JJ medieval) (NNS streets)) (VP (VBN filled) (PP (IN with) (NP (NP (NNS clubs)) (, ,) (NP (JJ Catalan) (NNS restaurants)) (CC and) (NP (JJ trendy) (NNS bars))))))))"
        },
        {
            "tree": "(S (NP (NP (DT The) (JJ charming) (NNP Gothic) (NNP Quarter)) (, ,) (CC or) (NP (NNP Barri) (NNP Gòtic))) (, ,) (VP (VBZ has) (NP (NP (JJ narrow) (JJ medieval) (NNS streets)) (VP (VBN filled) (PP (IN with) (NP (NP (JJ Catalan) (NNS restaurants)) (, ,) (NP (JJ trendy) (NNS bars)) (CC and) (NP (NNS clubs))))))))"
        }
    ]
}

我尝试使用 transformers 库来做到这一点，但这只会让我感到困惑，我意识到我需要使用 NLTK 来做所有事情。