我使用以下代码从网页http://ajaxian.com中删除XFN内容 但我正在收集以下错误:
Traceback (most recent call last): File "C:\Users\Somnath\workspace\us.chakra.social.web.microformat\src\microformats_xfn_scrape.py", line 40, in <module>
page = urllib2.urlopen(URL)
File "C:\Python27\lib\urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "C:\Python27\lib\urllib2.py", line 394, in open
response = self._open(req, data)
File "C:\Python27\lib\urllib2.py", line 417, in _open
'unknown_open', req)
File "C:\Python27\lib\urllib2.py", line 372, in _call_chain
result = func(*args)
File "C:\Python27\lib\urllib2.py", line 1232, in unknown_open
raise URLError('unknown url type: %s' % type)
urllib2.URLError: <urlopen error unknown url type: c>
我的代码如下:
'''
Created on Jan 11, 2013
@author: Somnath
'''
# Scraping XFN content from a web page
# -*-coding: utf-8 -*-
import sys
import urllib2
import HTMLParser
from BeautifulSoup import BeautifulSoup
# Try http://ajaxian.com
URL = sys.argv[0]
XFN_TAGS = set([
'colleague',
'sweetheart',
'parent',
'co-resident',
'co-worker',
'muse',
'neighbor',
'sibling',
'kin',
'child',
'date',
'spouse',
'me',
'acquaintance',
'met',
'crush',
'contact',
'friend',
])
#try:
page = urllib2.urlopen(URL)
#except urllib2.URLError:
# print 'Failed to fetch ' + item
#try:
soup = BeautifulSoup(page)
#except HTMLParser.HTMLParseError:
# print 'Failed to parse ' + item
anchorTags = soup.findAll('a')
for a in anchorTags:
if a.has_key('rel'):
if len(set(a['rel'].split()) & XFN_TAGS) > 0:
tags = a['rel'].split()
print a.contents[0], a['href'], tags
我在Eclipse下运行PyDev并使用Run As - &gt; Python运行并使用参数“http://ajaxian.com/”设置运行时配置。任何人都可以建议我哪里出错了吗?
还有一件事:我在代码中评论了两个try块,因为它给出了一个错误未定义的变量:item。如果我想重新包含try-except块,我应该在try块外面给出变量的空白定义吗?我该怎样摆脱这个问题?
答案 0 :(得分:4)
正如您所建议的,sys.argv[0]
打印脚本的路径,这是因为您调用脚本
python microformats_xfn_scrape.py <some_argument>
这里sys.argv的索引0是脚本的名称而不是参数。
您需要做的是使用<url>
参数调用脚本,例如:
python microformats_xfn_scrape.py http://www.ajaxian.com/
并在您的脚本中将sys.argv[0]
更改为sys.argv[1]
,因为url参数索引为1。