python 面向对象入门

9AMC

该段代码涵盖了如下内容：
1. 类的定义，类继承
2. 类和实例的属性定义
3. 类和实例的方法定义
4. 类的可见性定义 private public protected
5. rss lib学习


'''
python learn parse rss
url : http://wiki.python.org/moin/RssLibraries
Install feedparser
url : http://code.google.com/p/feedparser/
dowload install file
python setup install
'''
import feedparser
class Inspect:   
#print object
def info(self, spacing=10, collapse=1):
object = self
"""Print methods and doc strings.
Takes module, class, list, dictionary, or string."""
methodList = [e for e in dir(object) if callable(getattr(object, e))]
processFunc = collapse and (lambda s: " ".join(s.split())) or (lambda s: s)
print "\n".join(["%s %s" %
(method.ljust(spacing),
processFunc(str(getattr(object, method).__doc__)))
for method in methodList])
#inheirt from Inspect
class RssParser(Inspect):
"""A simple parse javaeye rss"""
#Define Class atrributes
parseCount = 0
"initial rss parser"
def __init__(self, url=None):
#Define instance attributes
self.url = url
#Define instance protected attributes
self._author = "edison"
#Define instance private attributes
self.__intro = "rss parser"
#Analysys Rss
#instance method
def parse(self,url):
rss = feedparser.parse(self.url)
self.__puts(rss)
self.parseCount += 1
#print Rss
#instance private method
def __puts(self,rss):
print "info:%s" % self.__intro
print "author:%s" % self._author      
print "title:%s"  % rss.feed.title.encode("utf-8")
print "subtile:%s" % rss.feed.subtitle.encode("utf-8")
print "generator:%s" % rss.feed.generator.encode("utf-8")
print "href:%s" % rss["href"]
entries = rss["entries"]
for item in entries:
print "Rss" + "* " * 20
e = item["summary_detail"]
print "base:%s" % e["base"]
print "title:%s" % e["type"]
print "description:%s" % e["value"].encode("utf-8")

@staticmethod
def count():
print RssParser.parseCount

if __name__ == '__main__':
pss = RssParser("http://edisonlz.iteye.com/rss")
print "* " * 60
pss.parse(pss.url)
print "* " * 60
RssParser.count()
print "* " * 60
pss.info()
pass
#print pss method
print dir(pss)