Python feedparser无法返回条目，程序运行异常求助

Hey there, let's figure out why your feedparser code stopped working with the BBC RSS feed—here's a step-by-step breakdown of possible causes and fixes:

First: Add Debugging to See What's Actually Happening #

Right now your code doesn't give any feedback about whether the parse succeeded or failed. Let's add some debug checks to uncover the root issue. Replace your current code with this:

import feedparser
import traceback

try:
    # Add a timeout to avoid hanging indefinitely
    bbc = feedparser.parse('http://feeds.bbci.co.uk/news/rss.xml?edition=uk', request_timeout=10)
    
    # Print key diagnostics
    print(f"HTTP Status Code: {bbc.get('status', 'No status returned')}")
    print(f"Number of Feed Entries: {len(bbc.entries)}")
    print(f"Bozo Error Flag: {bbc.bozo}")
    
    # If there's a parsing error, show details
    if bbc.bozo != 0:
        print(f"Parsing Error Details: {bbc.bozo_exception}")
        
except Exception as e:
    print(f"Unexpected Error: {str(e)}")
    traceback.print_exc()

Run this, and the output will tell you exactly where things are breaking.

Common Causes & Fixes #

1. Network Timeouts or Access Restrictions #

Feedparser doesn't have a default timeout, so if your request to BBC's feed gets stuck (e.g., due to network lag, IP blocking, or DNS issues), it'll hang silently instead of crashing. The request_timeout=10 parameter in the debug code above fixes this by forcing a timeout after 10 seconds.

If you get a timeout error:

• Check your internet connection
• Try accessing the RSS URL directly in a browser to confirm it's reachable
• If you're on a corporate network, check if a proxy is blocking the request

2. HTTP → HTTPS Redirect Issues #

BBC might be enforcing HTTPS now, but your code uses the HTTP URL. Feedparser can sometimes struggle with automatic redirects. Try swapping the URL to HTTPS:

bbc = feedparser.parse('https://feeds.bbci.co.uk/news/rss.xml?edition=uk', request_timeout=10)

3. RSS Feed URL Changes #

While BBC's official RSS feed URL hasn't changed recently, it's worth verifying. Visit the URL in your browser—if you see a "page not found" error, you'll need to find the updated RSS endpoint for BBC UK News.

4. Feedparser Version Compatibility #

If you updated feedparser in the last week, a new version might have introduced a bug. Try rolling back to the version that was working for you:

pip install feedparser==<your-working-version-number>

You can check your current version with pip show feedparser.

5. Parsing Errors (Bozo Flag) #

If the debug code shows bbc.bozo != 0, that means feedparser hit a non-fatal parsing error (e.g., malformed XML in the feed). The bbc.bozo_exception will tell you exactly what's wrong—BBC might have temporarily broken their RSS formatting, which is rare but possible.

Final Steps #

Once you run the debug code, you'll have a clear direction to fix the issue. If it's a network or URL problem, adjusting those should get things back on track. If it's a parsing error, you might need to wait for BBC to fix their feed, or add custom handling for the malformed XML.

内容的提问来源于stack exchange，提问作者Versace