我使用 feedparser http://www.feedparser.org/来解析 Atom 提要,并对生成的 Python 对象进行一些操作。之后,我想将对象序列化回 Atom。但是 feedparser 似乎没有提供这样做的方法?
我注意到其他 Atom 库,如 gdata http://code.google.com/p/gdata-python-client/或 demokritos http://jtauber.com/demokritos/但是,说实话,他们似乎很难初学者。我使用 feedparser 正是因为它极其简单。
根据 namsral 的良好响应,我用我最喜欢的模板语言 SimpleTAL 编写了一个序列化程序
import feedparser
from simpletal import simpleTAL, simpleTALES, simpleTALUtils
mytemplate = """
<feed xmlns="http://www.w3.org/2005/Atom">
<title tal:condition="feed/title" tal:content="feed/title"/>
<link tal:condition="feed/link" tal:content="feed/link"/>
<updated tal:condition="feed/updated" tal:content="feed/updated"/>
<id tal:condition="feed/id" tal:content="feed/id"/>
<!-- TODO other feed variables -->
<entry xmlns='http://www.w3.org/2005/Atom'
xmlns:thr='http://purl.org/syndication/thread/1.0'
tal:repeat="entry entries">
<title tal:condition="entry/title" tal:content="entry/title"/>
<summary tal:condition="entry/summary" tal:content="entry/summary"/>
<content tal:condition="entry/content" tal:content="python: entry.content[0]['value']"/> <!-- TODO: metadata and the other items in content -->
<id tal:condition="entry/id" tal:content="entry/id"/>
<published tal:condition="entry/published" tal:content="entry/published"/>
<updated tal:condition="entry/updated" tal:content="entry/updated"/>
<!-- TODO other entry fields -->
</entry>
</feed>
"""
context = simpleTALES.Context(allowPythonPath=True)
template = simpleTAL.compileXMLTemplate (mytemplate)
class FeedParserPlus(feedparser.FeedParserDict):
def serialize(self):
context.addGlobal ("feed", self.feed)
context.addGlobal ("entries", self.entries)
result = simpleTALUtils.FastStringOutput()
template.expand (context, result)
return result.getvalue()
@classmethod
def parse(klass, text):
result = feedparser.parse(text)
return FeedParserPlus(result)