python nltk 如何展平解析树并存储在字符串中以进行进一步的字符串操作 [英] How to flatten the parse tree and store in a string for further string operations python nltk

问题描述

我正在尝试从树结构中获取扁平树，如下所示.

I am trying to get flat tree from the tree structure like the one given below.

我想在一个字符串中获取整个树，就像没有检测到坏树错误一样:

I want to get this whole tree in a string like without Bad tree detected error:

( (S (NP-SBJ (NP (DT The) (JJ high) (JJ seven-day) )(PP (IN of) (NP (DT the) (CD 400) (NNS money) )))(VP (VBD was) (NP-PRD (CD 8.12) (NN %) )(, ,) (ADVP (RB down) (PP (IN from) (NP (CD 8.14) (NN %) ))))(. .) ))

推荐答案

您可以使用 str 函数将树转换为字符串，然后拆分和连接如下:

You can convert the tree into string using str function then split and join as follow:

parse_string = ' '.join(str(tree).split()) 

print parse_string

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