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- Testing for Existence
- =====================
- Feeds in the real world may be missing elements, even elements that are
- required by the specification. You should always test for the existence of an
- element before getting its value. Never assume an element is present.
- To test whether elements exist, you can use standard :program:`Python`
- dictionary idioms.
- Testing if elements are present
- -------------------------------
- ::
- >>> import feedparser
- >>> d = feedparser.parse('http://feedparser.org/docs/examples/atom10.xml')
- >>> 'title' in d.feed
- True
- >>> 'ttl' in d.feed
- False
- >>> d.feed.get('title', 'No title')
- u'Sample feed'
- >>> d.feed.get('ttl', 60)
- 60
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