Question

我目前在Python中使用feedparser编写此代码：

import feedparser

RSS_FEEDS = {'cnn': 'http://rss.cnn.com/rss/edition.rss'}    

def get_news_test(publication="cnn"):
    feed = feedparser.parse(RSS_FEEDS[publication])
    articles_cnn = feed['entries']

    for article in articles_cnn:
        print(article)


get_news_test()

上面的代码返回所有当前文章。这是它返回的文章之一的示例：

{'title': "China's internet shutdowns tactics are spreading worldwide", 'title_detail': {'type': 'text/plain', 'language': None, 'base': 'http://rss.cnn.com/rss/edition.rss', 'value': "China's internet shutdowns tactics are spreading worldwide"}, 'summary': 'When Hong Kong police fired tear gas at peaceful pro-democracy protesters in 2014, the news moved swiftly through social media. Photos and videos of mostly student demonstrators being gassed helped fuel the outrage that ultimately drove hundreds of thousands of people into the streets.', 'summary_detail': {'type': 'text/html', 'language': None, 'base': 'http://rss.cnn.com/rss/edition.rss', 'value': 'When Hong Kong police fired tear gas at peaceful pro-democracy protesters in 2014, the news moved swiftly through social media. Photos and videos of mostly student demonstrators being gassed helped fuel the outrage that ultimately drove hundreds of thousands of people into the streets.'}, 'links': [{'rel': 'alternate', 'type': 'text/html', 'href': 'https://www.cnn.com/2019/01/17/africa/internet-shutdown-zimbabwe-censorship-intl/index.html'}], 'link': 'https://www.cnn.com/2019/01/17/africa/internet-shutdown-zimbabwe-censorship-intl/index.html', 'id': 'https://www.cnn.com/2019/01/17/africa/internet-shutdown-zimbabwe-censorship-intl/index.html', 'guidislink': False, 'published': 'Fri, 18 Jan 2019 07:40:48 GMT', 'published_parsed': time.struct_time(tm_year=2019, tm_mon=1, tm_mday=18, tm_hour=7, tm_min=40, tm_sec=48, tm_wday=4, tm_yday=18, tm_isdst=0), 'media_content': [{'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-super-169.jpg', 'height': '619', 'width': '1100'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-large-11.jpg', 'height': '300', 'width': '300'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-vertical-large-gallery.jpg', 'height': '552', 'width': '414'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-video-synd-2.jpg', 'height': '480', 'width': '640'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-live-video.jpg', 'height': '324', 'width': '576'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-t1-main.jpg', 'height': '250', 'width': '250'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-vertical-gallery.jpg', 'height': '360', 'width': '270'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-story-body.jpg', 'height': '169', 'width': '300'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-t1-main.jpg', 'height': '250', 'width': '250'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-assign.jpg', 'height': '186', 'width': '248'}, {'medium': 'image', 'url': 'https://cdn.cnn.com/cnnnext/dam/assets/190116165508-zimbabwe-protest-0115-01-hp-video.jpg', 'height': '144', 'width': '256'}]}

现在，我知道我可以通过调用以下方式返回部分内容，例如标题：

print(article.title)

但是，我对如何从提要中获取图像数据感到困惑。

Answer 1

每个文章条目都有media_content中的资产列表。每个资产节点都包含媒体类型（我只看到'image'），大小，网址等。

要简单列出每种资产的媒体类型和网址，可以使用以下内容：

import feedparser

feed = feedparser.parse("http://rss.cnn.com/rss/edition.rss")

for article in feed["entries"]:
    for media in article.media_content:
        print(f"medium: {media['medium']}")
        print(f"   url: {media['url']}")

输出：

medium: image
   url: https://cdn.cnn.com/cnnnext/dam/assets/190107112254-01-game-of-thrones-spain-castle-of-zafra-t1-main.jpg
medium: image
   url: https://cdn.cnn.com/cnnnext/dam/assets/190107112254-01-game-of-thrones-spain-castle-of-zafra-assign.jpg
medium: image
   url: https://cdn.cnn.com/cnnnext/dam/assets/190107112254-01-game-of-thrones-spain-castle-of-zafra-hp-video.jpg
...

如果您要请求和保存'image'类型的资产，可以使用requests：

import feedparser
import os
import requests

feed = feedparser.parse("http://rss.cnn.com/rss/edition.rss")

for article in feed["entries"]:
    for media in article.media_content:
        if media["medium"] == "image":
            img_data = requests.get(media["url"]).content
            with open(os.path.basename(media["url"]), "wb") as handler:
                handler.write(img_data)

如何使用Python访问RSS feed中的图像和图像URL？

1 个答案: