创建字符串列表而不是单词列表

Question

输入数据：

[{"is_sarcastic": 1, "headline": "thirtysomething scientists unveil doomsday clock of hair loss", "article_link": "https://www.theonion.com/thirtysomething-scientists-unveil-doomsday-clock-of-hai-1819586205"},
{"is_sarcastic": 0, "headline": "dem rep. totally nails why congress is falling short on gender, racial equality", "article_link": "https://www.huffingtonpost.com/entry/donna-edwards-inequality_us_57455f7fe4b055bb1170b207"}
]

预期产量：

["thirtysomething scientists unveil doomsday clock hair loss",  
"dem rep totally nails why congress is falling short on gender racial equality"]

我能够通过后续的代码片段获得预期的输出。你知道吗

stop_words = ["a", "about", "above", "after", "again", "..."]
_corpus, _result = [], []
for text in data:
    text_clean = [word for word in re.split('\W+', text['headline'])if word.lower() not in stop_words and len(word) > 2]
    _corpus.append(' '.join(text_clean))
    _result.append(text['is_sarcastic'])

我试图使它简洁，纯粹是为了学习的目的，但无法复制与下面列出的代码片段相同的结果。你知道吗

 _corpus, _result = map(list, zip(
        *[(''.join(word), text['is_sarcastic']) for text in data for word in re.split('\W+', text['headline'])
          if word.lower() not in stop_words and len(word) > 2]))

我得到的是单词列表而不是字符串。例如：['thirtysomething', 'scientists', ...]。你知道吗

我没有恰当地使用join方法。我怎样才能做到这一点？你知道吗

编辑1：我的目标是得到字符串列表而不是单词列表。
编辑2：我没有包括整个数据集，因为我认为它与问题无关。
编辑3：请忽略这个帖子，我有一个很难沟通清楚。感谢你们的帮助。
编辑4：重新格式化问题。你知道吗

Answer 1

要将以下代码段转换为列表：

stop_words = ["a", "about", "above", "after", "again", "..."]
_corpus, _result = [], []
for text in data:
    text_clean = [word for word in re.split('\W+', text['headline']) if word.lower() not in stop_words and len(word) > 2]
    _corpus.append(' '.join(text_clean))
    _result.append(text['is_sarcastic'])

这不是一个好主意，因为代码已经不容易阅读了！您应该从函数开始：

def clean(headline):
    return [word for word in re.split('\W+', headline) if word.lower() not in stop_words and len(word) > 2]

_corpus, _result = [], []
for text in data:
    _corpus.append(' '.join(clean(text['headline'])))
    _result.append(text['is_sarcastic'])

如果需要列表理解，请使用单个列表来存储对：

_ret = []
for text in data:
    _ret.append((' '.join(clean(text['headline'])), text['is_sarcastic']))
# [('thirtysomething scientists unveil doomsday clock hair loss', 1), ('dem rep totally nails why congress falling short gender racial equality', 0)]

这个循环很容易转换成一个列表。为了得到结果，zip需要重新创建两个元组的元素：

_corpus, _result = zip(*_ret)
# ('thirtysomething scientists unveil doomsday clock hair loss', 'dem rep totally nails why congress falling short gender racial equality') (1, 0)

或者，就像你所做的：

_corpus, _result = map(list, zip(*_ret))
# ['thirtysomething scientists unveil doomsday clock hair loss', 'dem rep totally nails why congress falling short gender racial equality'] [1, 0]

完整代码：

import re

stop_words = ["a", "about", "above", "after", "again", "..."]
_ret = [(' '.join(clean(text['headline'])), text['is_sarcastic']) for text in data]
_corpus, _result = map(list, zip(*_ret))
print (_corpus, _result)
# ['thirtysomething scientists unveil doomsday clock hair loss', 'dem rep totally nails why congress falling short gender racial equality'] [1, 0]

离你写的不远，但是text['is_sarcastic']放错地方了。你知道吗