Python HTMLParser:AttributeError

Python HTMLParser: AttributeError

提问人:Chweng Mega 提问时间:6/15/2017 最后编辑:Chweng Mega 更新时间:6/15/2017 访问量:1478

问:

我正在使用 HTMLParser (python 2.7) 来解析我使用 urllib2 下拉的页面,当我想将数据存储到 feed 方法中的列表中时,我遇到了 AttributeError 异常。但是,如果注释掉__init__方法,则异常消失了


main.py

# -*- coding: utf-8 -*-
from HTMLParser import HTMLParser
import urllib2
import sys
reload(sys)
sys.setdefaultencoding('utf-8')


class MyHTMLParser(HTMLParser):
    def __init__(self):
        self.terms = []
        self.definitions = []

    def handle_starttag(self, tag, attrs):
        # retrive the terms
        if tag == 'div':
            for attribute, value in attrs:
                if value == 'word':
                    self.terms.append(attrs[1][1])
        # retrive the definitions
                if value == 'desc':
                    if attrs[1][1]:
                        self.definitions.append(attrs[1][1])
                    else:
                        self.definitions.append(None)


parser = MyHTMLParser()
# open page and retrive source page
response = urllib2.urlopen('http://localhost/')
html = response.read().decode('utf-8')
response.close()

# extract the terms and definitions
parser.feed(html)

输出

Traceback (most recent call last):
  File "/Users/megachweng/Project/Anki-Youdao/combined.py", line 35, in <module>
    parser.feed(html)
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/HTMLParser.py", line 116, in feed
    self.rawdata = self.rawdata + data
AttributeError: MyHTMLParser instance has no attribute 'rawdata'
python-2.7 html解析

评论

0赞 Chweng Mega 6/15/2017
对不起,由于某种原因,我不能使用任何第三方软件包

答:

1赞 Andrea 6/15/2017 #1

我认为您没有正确初始化 HTMLParser。也许您根本不需要初始化它。这对我有用:

# -*- coding: utf-8 -*-
from HTMLParser import HTMLParser
import urllib2
import sys
reload(sys)
sys.setdefaultencoding('utf-8')


class MyHTMLParser(HTMLParser):  
    def handle_starttag(self, tag, attrs):
        print "Encountered a start tag:", tag
        # retrive the terms
        if tag == 'div':
            for attribute, value in attrs:
                if value == 'word':
                    self.terms.append(attrs[1][1])
        # retrive the definitions
                if value == 'desc':
                    if attrs[1][1]:
                        self.definitions.append(attrs[1][1])
                    else:
                        self.definitions.append(None)


parser = MyHTMLParser()
# open page and retrive source page
response = urllib2.urlopen('http://localhost/')
html = response.read().decode('utf-8')
response.close()

# extract the terms and definitions
parser.feed(html)

更新

# -*- coding: utf-8 -*-
from HTMLParser import HTMLParser
import urllib2
import sys
reload(sys)
sys.setdefaultencoding('utf-8')


class MyHTMLParser(HTMLParser):
    def __init__(self):
        HTMLParser.__init__(self)
        self.terms = []
        self.definitions = []

    def handle_starttag(self, tag, attrs):
        # retrive the terms
        for attribute in attrs:
            if attribute[0] == 'align':
                self.terms.append(attribute[1])
                self.definitions.append(attribute[1])


parser = MyHTMLParser()

html = "<table align='center'><tr><td align='left'><p>ciao</p></td></tr></table>"

# extract the terms and definitions
parser.feed(html)

print parser.terms
print parser.definitions

输出:

['居中', '左']

['居中', '左']

评论

0赞 Chweng Mega 6/15/2017
是的,它绝对有效,但是任何如何将 attrs[1][1] 存储到列表中以便我可以访问它的想法(打印 parser.terms --MyHTMLParser 实例没有属性“terms”)
0赞 Chweng Mega 6/15/2017 #2

好的,我得到了解决方案,无法工作,必须对名称进行硬编码super().__init__

def __init__(self):
        HTMLParser.__init__(self)