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< span > python-feedgen 0.2.8 documentation< / span > < / a > < / h1 >
2013-05-05 22:12:47 +02:00
< h2 class = "heading" > < span > API Documentation< / span > < / h2 >
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< div class = "section" id = "module-feedgen" >
< span id = "api-documentation" > < / span > < h1 > API Documentation< a class = "headerlink" href = "#module-feedgen" title = "Permalink to this headline" > ¶< / a > < / h1 >
< div class = "section" id = "feedgen" >
< h2 > feedgen< a class = "headerlink" href = "#feedgen" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > This module can be used to generate web feeds in both ATOM and RSS format.
It has support for extensions. Included is for example an extension to
produce Podcasts.< / p >
< table class = "docutils field-list" frame = "void" rules = "none" >
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< tr class = "field-odd field" > < th class = "field-name" > copyright:< / th > < td class = "field-body" > 2013 by Lars Kiesow< / td >
< / tr >
< tr class = "field-even field" > < th class = "field-name" > license:< / th > < td class = "field-body" > FreeBSD and LGPL, see license.* for more details.< / td >
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< / tbody >
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< div class = "section" id = "create-a-feed" >
< h3 > Create a Feed< a class = "headerlink" href = "#create-a-feed" title = "Permalink to this headline" > ¶< / a > < / h3 >
< p > To create a feed simply instanciate the FeedGenerator class and insert some
data:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "kn" > from< / span > < span class = "nn" > feedgen.feed< / span > < span class = "kn" > import< / span > < span class = "n" > FeedGenerator< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > =< / span > < span class = "n" > FeedGenerator< / span > < span class = "p" > ()< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > id< / span > < span class = "p" > (< / span > < span class = "s" > ' http://lernfunk.de/media/654321' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > title< / span > < span class = "p" > (< / span > < span class = "s" > ' Some Testfeed' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > author< / span > < span class = "p" > (< / span > < span class = "p" > {< / span > < span class = "s" > ' name' < / span > < span class = "p" > :< / span > < span class = "s" > ' John Doe' < / span > < span class = "p" > ,< / span > < span class = "s" > ' email' < / span > < span class = "p" > :< / span > < span class = "s" > ' john@example.de' < / span > < span class = "p" > }< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > link< / span > < span class = "p" > (< / span > < span class = "n" > href< / span > < span class = "o" > =< / span > < span class = "s" > ' http://example.com' < / span > < span class = "p" > ,< / span > < span class = "n" > rel< / span > < span class = "o" > =< / span > < span class = "s" > ' alternate' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > logo< / span > < span class = "p" > (< / span > < span class = "s" > ' http://ex.com/logo.jpg' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > subtitle< / span > < span class = "p" > (< / span > < span class = "s" > ' This is a cool feed!' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > link< / span > < span class = "p" > (< / span > < span class = "n" > href< / span > < span class = "o" > =< / span > < span class = "s" > ' http://larskiesow.de/test.atom' < / span > < span class = "p" > ,< / span > < span class = "n" > rel< / span > < span class = "o" > =< / span > < span class = "s" > ' self' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > language< / span > < span class = "p" > (< / span > < span class = "s" > ' en' < / span > < span class = "p" > )< / span >
< / pre > < / div >
< / div >
< p > Note that for the methods which set fields that can occur more than once in
a feed you can use all of the following ways to provide data:< / p >
< ul class = "simple" >
< li > Provide the data for that element as keyword arguments< / li >
< li > Provide the data for that element as dictionary< / li >
< li > Provide a list of dictionaries with the data for several elements< / li >
< / ul >
< p > Example:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > contributor< / span > < span class = "p" > (< / span > < span class = "n" > name< / span > < span class = "o" > =< / span > < span class = "s" > ' John Doe' < / span > < span class = "p" > ,< / span > < span class = "n" > email< / span > < span class = "o" > =< / span > < span class = "s" > ' jdoe@example.com' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > contributor< / span > < span class = "p" > ({< / span > < span class = "s" > ' name' < / span > < span class = "p" > :< / span > < span class = "s" > ' John Doe' < / span > < span class = "p" > ,< / span > < span class = "s" > ' email' < / span > < span class = "p" > :< / span > < span class = "s" > ' jdoe@example.com' < / span > < span class = "p" > })< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > contributor< / span > < span class = "p" > ([{< / span > < span class = "s" > ' name' < / span > < span class = "p" > :< / span > < span class = "s" > ' John Doe' < / span > < span class = "p" > ,< / span > < span class = "s" > ' email' < / span > < span class = "p" > :< / span > < span class = "s" > ' jdoe@example.com' < / span > < span class = "p" > },< / span > < span class = "o" > ...< / span > < span class = "p" > ])< / span >
< / pre > < / div >
< / div >
< / div >
< div class = "section" id = "generate-the-feed" >
< h3 > Generate the Feed< a class = "headerlink" href = "#generate-the-feed" title = "Permalink to this headline" > ¶< / a > < / h3 >
< p > After that you can generate both RSS or ATOM by calling the respective method:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "n" > atomfeed< / span > < span class = "o" > =< / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > atom_str< / span > < span class = "p" > (< / span > < span class = "n" > pretty< / span > < span class = "o" > =< / span > < span class = "bp" > True< / span > < span class = "p" > )< / span > < span class = "c" > # Get the ATOM feed as string< / span >
< span class = "gp" > > > > < / span > < span class = "n" > rssfeed< / span > < span class = "o" > =< / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > rss_str< / span > < span class = "p" > (< / span > < span class = "n" > pretty< / span > < span class = "o" > =< / span > < span class = "bp" > True< / span > < span class = "p" > )< / span > < span class = "c" > # Get the RSS feed as string< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > atom_file< / span > < span class = "p" > (< / span > < span class = "s" > ' atom.xml' < / span > < span class = "p" > )< / span > < span class = "c" > # Write the ATOM feed to a file< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > rss_file< / span > < span class = "p" > (< / span > < span class = "s" > ' rss.xml' < / span > < span class = "p" > )< / span > < span class = "c" > # Write the RSS feed to a file< / span >
< / pre > < / div >
< / div >
< / div >
< div class = "section" id = "add-feed-entries" >
< h3 > Add Feed Entries< a class = "headerlink" href = "#add-feed-entries" title = "Permalink to this headline" > ¶< / a > < / h3 >
< p > To add entries (items) to a feed you need to create new FeedEntry objects
and append them to the list of entries in the FeedGenerator. The most
convenient way to go is to use the FeedGenerator itself for the
instantiation of the FeedEntry object:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "n" > fe< / span > < span class = "o" > =< / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > add_entry< / span > < span class = "p" > ()< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fe< / span > < span class = "o" > .< / span > < span class = "n" > id< / span > < span class = "p" > (< / span > < span class = "s" > ' http://lernfunk.de/media/654321/1' < / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fe< / span > < span class = "o" > .< / span > < span class = "n" > title< / span > < span class = "p" > (< / span > < span class = "s" > ' The First Episode' < / span > < span class = "p" > )< / span >
< / pre > < / div >
< / div >
< p > The FeedGenerators method add_entry(...) without argument provides will
automatically generate a new FeedEntry object, append it to the feeds
internal list of entries and return it, so that additional data can be
added.< / p >
< / div >
< div class = "section" id = "extensions" >
< h3 > Extensions< a class = "headerlink" href = "#extensions" title = "Permalink to this headline" > ¶< / a > < / h3 >
< p > The FeedGenerator supports extension to include additional data into the XML
structure of the feeds. Extensions can be loaded like this:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > load_extension< / span > < span class = "p" > (< / span > < span class = "s" > ' someext' < / span > < span class = "p" > ,< / span > < span class = "n" > atom< / span > < span class = "o" > =< / span > < span class = "bp" > True< / span > < span class = "p" > ,< / span > < span class = "n" > rss< / span > < span class = "o" > =< / span > < span class = "bp" > True< / span > < span class = "p" > )< / span >
< / pre > < / div >
< / div >
< p > This will try to load the extension “someext” from the file
< cite > ext/someext.py< / cite > . It is required that < cite > someext.py< / cite > contains a class named
“SomextExtension” which is required to have at least the two methods
< cite > extend_rss(...)< / cite > and < cite > extend_atom(...)< / cite > . Although not required, it is
strongly suggested to use BaseExtension from < cite > ext/base.py< / cite > as superclass.< / p >
< p > < cite > load_extension(‘ someext’ , ...)< / cite > will also try to load a class named
“SomextEntryExtension” for every entry of the feed. This class can be
located either in the same file as SomextExtension or in
< cite > ext/someext_entry.py< / cite > which is suggested especially for large extensions.< / p >
< p > The parameters < cite > atom< / cite > and < cite > rss< / cite > tell the FeedGenerator if the extensions
should only be used for either ATOM or RSS feeds. The default value for both
parameters is true which means that the extension would be used for both
kinds of feeds.< / p >
< p > < strong > Example: Produceing a Podcast< / strong > < / p >
< p > One extension already provided is the podcast extension. A podcast is an RSS
feed with some additional elements for ITunes.< / p >
< p > To produce a podcast simply load the < cite > podcast< / cite > extension:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "gp" > > > > < / span > < span class = "kn" > from< / span > < span class = "nn" > feedgen.feed< / span > < span class = "kn" > import< / span > < span class = "n" > FeedGenerator< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > =< / span > < span class = "n" > FeedGenerator< / span > < span class = "p" > ()< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > load_extension< / span > < span class = "p" > (< / span > < span class = "s" > ' podcast' < / span > < span class = "p" > )< / span >
< span class = "gp" > ...< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > podcast< / span > < span class = "o" > .< / span > < span class = "n" > itunes_category< / span > < span class = "p" > (< / span > < span class = "s" > ' Technology' < / span > < span class = "p" > ,< / span > < span class = "s" > ' Podcasting' < / span > < span class = "p" > )< / span >
< span class = "gp" > ...< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > rss_str< / span > < span class = "p" > (< / span > < span class = "n" > pretty< / span > < span class = "o" > =< / span > < span class = "bp" > True< / span > < span class = "p" > )< / span >
< span class = "gp" > > > > < / span > < span class = "n" > fg< / span > < span class = "o" > .< / span > < span class = "n" > rss_file< / span > < span class = "p" > (< / span > < span class = "s" > ' podcast.xml' < / span > < span class = "p" > )< / span >
< / pre > < / div >
< / div >
< p > Of cause the extension has to be loaded for the FeedEntry objects as well
but this is done automatically by the FeedGenerator for every feed entry if
the extension is loaded for the whole feed. You can, however, load an
extension for a specific FeedEntry by calling < cite > load_extension(...)< / cite > on that
entry. But this is a rather uncommon use.< / p >
< p > Of cause you can still produce a normal ATOM or RSS feed, even if you have
loaded some plugins by temporary disabling them during the feed generation.
This can be done by calling the generating method with the keyword argument
< cite > extensions< / cite > set to < cite > False< / cite > .< / p >
< / div >
< div class = "section" id = "testing-the-generator" >
< h3 > Testing the Generator< a class = "headerlink" href = "#testing-the-generator" title = "Permalink to this headline" > ¶< / a > < / h3 >
< p > You can test the module by simply executing:< / p >
< div class = "highlight-python" > < pre > $ pythom -m feedgen < / pre >
< / div >
< / div >
< / div >
< p > Contents:< / p >
< div class = "toctree-wrapper compound" >
< ul >
< li class = "toctree-l1" > < a class = "reference internal" href = "api.feed.html" > feedgen.feed< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "api.entry.html" > feedgen.entry< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "api.util.html" > feedgen.util< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "ext/api.ext.base.html" > feedgen.ext.base< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "ext/api.ext.podcast.html" > feedgen.ext.podcast< / a > < / li >
< li class = "toctree-l1" > < a class = "reference internal" href = "ext/api.ext.podcast_entry.html" > feedgen.ext.podcast_entry< / a > < / li >
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