列表理解返回“生成器对象…”

我正试图简洁地从字典中创建一个列表。

以下代码有效:

def main():
    newsapi = NewsApiClient(api_key=API_KEY)
    top_headlines = newsapi.get_everything(q="Merkel",language="en")
    news = json.dumps(top_headlines)
    news = json.loads(news)
    articles = []
    for i in news['articles']:
        articles.append(i['title'])
    print(articles)

输出:

['Merkel “Helix Suppressor” Rifle and Merkel Suppressors', 'Angela Merkel', 
 'Merkel says Europe should do more to stop Syria war - Reuters', 
 'Merkel says Europe should do more to stop Syria war - Reuters', 
 'Merkel muss weg! Merkel has to go! Demonstrations in Hamburg', ... , 
 "Bruised 'Queen' Merkel Lives..."]

但我在其他地方见过,并且一直在努力学习,列举理解。更换 for i in news['articles']: 循环方式:

def main():
    ...
    articles = []
    articles.append(i['title'] for i in news['articles'])
    print(articles)

我本来希望得到类似的结果。相反,它返回:

[<generator object main.<locals>.<genexpr> at 0x035F9570>]

我找到了 this related solution 但是执行以下操作会输出标题(yay!)三次(boo!):

def main():
    ...
    articles = []
    articles.append([i['title'] for x in news for i in news['articles']])
    print(articles)

通过列表理解生成文章的正确方法是什么?

_{忽略我的例行程序 main() 而不是调用函数。稍后我会解决的。}