如何在python中读取多个nltk语料库文件并写入单个文本文件

import nltk
from nltk.corpus import PlaintextCorpusReader

# 定义语料库文件路径
corpus_root = 'path_to_corpus_directory'

# 获取所有语料库文件
fileids = nltk.corpus.nps_chat.fileids() + nltk.corpus.brown.fileids() + nltk.corpus.reuters.fileids()

# 创建一个新的语料库
new_corpus = PlaintextCorpusReader(corpus_root, fileids)

# 将语料库文件写入单个文本文件
output_file = 'path_to_output_file.txt'
with open(output_file, 'w') as f:
    for fileid in new_corpus.fileids():
        f.write(new_corpus.raw(fileid))
        f.write('\n')

print("语料库文件已成功写入到文本文件中。")