python生成RSS（PyRSS2Gen）

既然能够用python解析rss，那么也顺带研究下生成rss。

其实很简单，只是生成一个比较特殊点的xml文档而已。

这里我使用了PyRss2Gen,用法很简单，看代码就知道了，如下：

 import datetime
 import PyRSS2Gen  

 rss = PyRSS2Gen.RSS2(
    title = "Andrew's PyRSS2Gen feed",
    link = "http://www.dalkescientific.com/Python/PyRSS2Gen.html",
    description = "The latest news about PyRSS2Gen, a "
                  "Python library for generating RSS2 feeds",  

    lastBuildDate = datetime.datetime.now(),  

    items = [
       PyRSS2Gen.RSSItem(
         title = "PyRSS2Gen-0.0 released",
         link = "http://www.dalkescientific.com/news/030906-PyRSS2Gen.html",
         description = "Dalke Scientific today announced PyRSS2Gen-0.0, "
                       "a library for generating RSS feeds for Python.  ",
         guid = PyRSS2Gen.Guid("http://www.dalkescientific.com/news/"
                          "030906-PyRSS2Gen.html"),
         pubDate = datetime.datetime(2003, 9, 6, 21, 31)),
       PyRSS2Gen.RSSItem(
         title = "Thoughts on RSS feeds for bioinformatics",
         link = "http://www.dalkescientific.com/writings/diary/"
                "archive/2003/09/06/RSS.html",
         description = "One of the reasons I wrote PyRSS2Gen was to "
                       "experiment with RSS for data collection in "
                       "bioinformatics.  Last year I came across...",
         guid = PyRSS2Gen.Guid("http://www.dalkescientific.com/writings/"
                               "diary/archive/2003/09/06/RSS.html"),
         pubDate = datetime.datetime(2003, 9, 6, 21, 49)),
    ])  

 rss.write_xml(open("pyrss2gen.xml", "w"))

这个生成的rss文档是这样的：

 <?xml version="1.0" encoding="iso-8859-1"?>
 <rss version="2.0">
 <channel>
 <title>Andrew's PyRSS2Gen feed</title>
 <link>http://www.dalkescientific.com/Python/PyRSS2Gen.html</link>
 <description>The latest news about PyRSS2Gen, a Python library for generating RSS2 feeds</description>
 <lastBuildDate>Thu, 15 May 2014 20:24:12 GMT</lastBuildDate>
 <generator>PyRSS2Gen-1.1.0</generator>
 <docs>http://blogs.law.harvard.edu/tech/rss</docs>
 <item>
     <title>PyRSS2Gen-0.0 released</title>
     <link>http://www.dalkescientific.com/news/030906-PyRSS2Gen.html</link>
     <description>Dalke Scientific today announced PyRSS2Gen-0.0, a library for generating RSS feeds for Python.  </description>
     <guid isPermaLink="true">http://www.dalkescientific.com/news/030906-PyRSS2Gen.html</guid>
     <pubDate>Sat, 06 Sep 2003 21:31:00 GMT</pubDate>
 </item>
 <item>
     <title>Thoughts on RSS feeds for bioinformatics</title>
     <link>http://www.dalkescientific.com/writings/diary/archive/2003/09/06/RSS.html</link>
     <description>One of the reasons I wrote PyRSS2Gen was to experiment with RSS for data collection in bioinformatics.  Last year I came across...</description>
     <guid isPermaLink="true">http://www.dalkescientific.com/writings/diary/archive/2003/09/06/RSS.html</guid>
     <pubDate>Sat, 06 Sep 2003 21:49:00 GMT</pubDate>
 </item>
 </channel>
 </rss>