python - 如何将文件中的行追加到列表中，同时保留行数 - python 3

Question

我正在尝试从包含大约 90000 行的文件中提取单词(每行有三到几百个单词。 我想在词干后将这些行附加到列表中。我能够将词干单词插入到包含一行的列表中。我想将单词插入到列表中，同时保留 90000 行。有什么想法吗？

clean_sentence = [] 打开(文件夹路径+文本文件名，'r'，编码='utf-8')作为f:

    for line in f:
        sentence = line.split()

        for word in sentence:
            if word.endswith('er'):
                clean_sentence.append(word[:-2])
            else:
                clean_sentence.append(word)
        x = ' '.join(clean_sentence)

    with open('StemmingOutFile.txt','w', encoding="utf8") as StemmingOutFile:
        StemmingOutFile.write(x)

该文件不是英文的，但这里有一个示例说明了当前的问题:当前代码产量:

why don't you like to watch TV? are there any more fruits? why not?

我希望输出文件是:

why don't you like to watch TV?

are there any more fruits?

why not? 

Answer 1

按行读取文件:

with open('file.txt','r') as f:
    lines = f.read().splitlines()

然后进行词干提取:

new_lines = []
for line in lines:
    new_lines.append(' '.join[stemmed(word) for word in line])

其中 stemmed 是一个函数，如下所示:

def stemmed(word):
    return word[:-2] if word.endswith('er') else word

然后将每一行new_lines写入StemmingOutFile.txt中。