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- :py:attr:`etag`
- ===============
- The ETag of the feed, as specified in the :abbr:`HTTP (Hypertext Transfer Protocol)` headers.
- The purpose of :py:attr:`etag` is explained more fully in :ref:`http.etag`.
- .. tip::
- :py:attr:`etag` will only be present if the feed was retrieved from a web server, and
- only if the web server provided an ETag :abbr:`HTTP (Hypertext Transfer Protocol)`
- header for the feed. If the feed was parsed from a local file or from a string
- in memory, :py:attr:`etag` will not be present.
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