如何使用 Python 访问 RSS 提要中的图像和图像 url？

Question

我目前在 Python 使用 feedparser:

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()

以上代码return是当前所有文章。这是它 return 编辑的其中一篇文章的示例：

{'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 return 这个的某些部分，例如通过调用标题：

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

每个文章条目在 media_content 中都有一个资产列表。每个资产节点包含媒体类型（我只看到'image'）、尺寸、url等

要简单地列出每个资产的媒体类型和 url，您可以使用以下内容：

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
...

如果你想请求和保存'image'类型的资源，你可以使用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 提要中的图像和图像 url？

How do I access the image and image url in an RSS feed using Python?

python

rss

feedparser