我需要将两个元素内的文本转换成一个字符串:
source_code = """<span class="UserName"><a href="#">Martin Elias</a></span>"""
>>> text
'Martin Elias'
我怎么能做到这一点?
我需要将两个元素内的文本转换成一个字符串:
source_code = """<span class="UserName"><a href="#">Martin Elias</a></span>"""
>>> text
'Martin Elias'
我怎么能做到这一点?
我搜索了“python parse html”,这是第一个结果: https ://docs.python.org/2/library/htmlparser.html
此代码取自 python 文档
from HTMLParser import HTMLParser
# create a subclass and override the handler methods
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print "Encountered a start tag:", tag
def handle_endtag(self, tag):
print "Encountered an end tag :", tag
def handle_data(self, data):
print "Encountered some data :", data
# instantiate the parser and fed it some HTML
parser = MyHTMLParser()
parser.feed('<html><head><title>Test</title></head>'
'<body><h1>Parse me!</h1></body></html>')
结果如下:
Encountered a start tag: html
Encountered a start tag: head
Encountered a start tag: title
Encountered some data : Test
Encountered an end tag : title
Encountered an end tag : head
Encountered a start tag: body
Encountered a start tag: h1
Encountered some data : Parse me!
Encountered an end tag : h1
Encountered an end tag : body
Encountered an end tag : html
使用它并通过查看 HTMLParser 中的代码,我想出了这个:
class myhtmlparser(HTMLParser):
def __init__(self):
self.reset()
self.NEWTAGS = []
self.NEWATTRS = []
self.HTMLDATA = []
def handle_starttag(self, tag, attrs):
self.NEWTAGS.append(tag)
self.NEWATTRS.append(attrs)
def handle_data(self, data):
self.HTMLDATA.append(data)
def clean(self):
self.NEWTAGS = []
self.NEWATTRS = []
self.HTMLDATA = []
你可以像这样使用它:
from HTMLParser import HTMLParser
pstring = source_code = """<span class="UserName"><a href="#">Martin Elias</a></span>"""
class myhtmlparser(HTMLParser):
def __init__(self):
self.reset()
self.NEWTAGS = []
self.NEWATTRS = []
self.HTMLDATA = []
def handle_starttag(self, tag, attrs):
self.NEWTAGS.append(tag)
self.NEWATTRS.append(attrs)
def handle_data(self, data):
self.HTMLDATA.append(data)
def clean(self):
self.NEWTAGS = []
self.NEWATTRS = []
self.HTMLDATA = []
parser = myhtmlparser()
parser.feed(pstring)
# Extract data from parser
tags = parser.NEWTAGS
attrs = parser.NEWATTRS
data = parser.HTMLDATA
# Clean the parser
parser.clean()
# Print out our data
print tags
print attrs
print data
现在您应该能够轻松地从这些列表中提取数据。我希望这有帮助!
我推荐使用 Python Beautiful Soup 4库。
pip install beautifulsoup4
它使 HTML 解析变得非常容易。
from bs4 import BeautifulSoup
source_code = """<span class="UserName"><a href="#">Martin Elias</a></span>"""
soup = BeautifulSoup(source_code)
print soup.a.string
>>> 'Martin Elias'
安装beautifulsoup,你可以这样做:
from BeautifulSoup import BeautifulSoup
source_code = '"""<span class="UserName"><a href="#">Martin Elias</a></span>"""'
soup = BeautifulSoup(source_code)
print soup.find('span',{'class':'UserName'}).text
您也可以尝试使用 html5lib 和 XPath,这里有一个很好的问题,该答案有一个重要的细节 ( namespaceHTMLElements
) 需要记住,以使 html5lib 按预期运行。我浪费了很多时间试图让它工作,因为我忽略了我需要改变它。