from mechanize import Browser
br = Browser()
br.open('http://somewebpage')
html = br.response().readlines()
for line in html:
print line
当在HTML文件中打印一行时，我试图找到一种方法，只显示每个HTML元素的内容，而不是格式本身。如果它发现'<a href="等等。例如">some text</a>'，它只会打印'some text'， '<b>hello</b>'打印'hello'，等等。该怎么做呢?
当前回答
我总是使用这个函数来剥离HTML标签，因为它只需要Python标准库:
对于Python 3:
from io import StringIO
from html.parser import HTMLParser
class MLStripper(HTMLParser):
def __init__(self):
super().__init__()
self.reset()
self.strict = False
self.convert_charrefs= True
self.text = StringIO()
def handle_data(self, d):
self.text.write(d)
def get_data(self):
return self.text.getvalue()
def strip_tags(html):
s = MLStripper()
s.feed(html)
return s.get_data()
对于Python 2:
from HTMLParser import HTMLParser
from StringIO import StringIO
class MLStripper(HTMLParser):
def __init__(self):
self.reset()
self.text = StringIO()
def handle_data(self, d):
self.text.write(d)
def get_data(self):
return self.text.getvalue()
def strip_tags(html):
s = MLStripper()
s.feed(html)
return s.get_data()
其他回答
我总是使用这个函数来剥离HTML标签，因为它只需要Python标准库:
对于Python 3:
from io import StringIO
from html.parser import HTMLParser
class MLStripper(HTMLParser):
def __init__(self):
super().__init__()
self.reset()
self.strict = False
self.convert_charrefs= True
self.text = StringIO()
def handle_data(self, d):
self.text.write(d)
def get_data(self):
return self.text.getvalue()
def strip_tags(html):
s = MLStripper()
s.feed(html)
return s.get_data()
对于Python 2:
from HTMLParser import HTMLParser
from StringIO import StringIO
class MLStripper(HTMLParser):
def __init__(self):
self.reset()
self.text = StringIO()
def handle_data(self, d):
self.text.write(d)
def get_data(self):
return self.text.getvalue()
def strip_tags(html):
s = MLStripper()
s.feed(html)
return s.get_data()
2020年更新
使用Mozilla Bleach库，它确实允许您自定义保留哪些标记和保留哪些属性，并且还可以根据值过滤属性
这里有两个例子来说明
1)不允许任何HTML标签或属性
获取原始文本样本
raw_text = """
<p><img width="696" height="392" src="https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-768x432.jpg" class="attachment-medium_large size-medium_large wp-post-image" alt="Ethereum Classic 51% Attack: Okex Crypto Exchange Suffers $5.6 Million Loss, Contemplates Delisting ETC" style="float:left; margin:0 15px 15px 0;" srcset="https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-768x432.jpg 768w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-300x169.jpg 300w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-1024x576.jpg 1024w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-696x392.jpg 696w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-1068x601.jpg 1068w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-747x420.jpg 747w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-190x107.jpg 190w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-380x214.jpg 380w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-760x428.jpg 760w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc.jpg 1280w" sizes="(max-width: 696px) 100vw, 696px" />Cryptocurrency exchange Okex reveals it suffered the $5.6 million loss as a result of the double-spend carried out by the attacker(s) in Ethereum Classic 51% attack. Okex says it fully absorbed the loss as per its user-protection policy while insisting that the attack did not cause any loss to the platform’s users. Also as part […]</p>
<p>The post <a rel="nofollow" href="https://news.bitcoin.com/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc/">Ethereum Classic 51% Attack: Okex Crypto Exchange Suffers $5.6 Million Loss, Contemplates Delisting ETC</a> appeared first on <a rel="nofollow" href="https://news.bitcoin.com">Bitcoin News</a>.</p>
"""
2)从原始文本中删除所有HTML标签和属性
# DO NOT ALLOW any tags or any attributes
from bleach.sanitizer import Cleaner
cleaner = Cleaner(tags=[], attributes={}, styles=[], protocols=[], strip=True, strip_comments=True, filters=None)
print(cleaner.clean(raw_text))
输出
Cryptocurrency exchange Okex reveals it suffered the $5.6 million loss as a result of the double-spend carried out by the attacker(s) in Ethereum Classic 51% attack. Okex says it fully absorbed the loss as per its user-protection policy while insisting that the attack did not cause any loss to the platform’s users. Also as part […]
The post Ethereum Classic 51% Attack: Okex Crypto Exchange Suffers $5.6 Million Loss, Contemplates Delisting ETC appeared first on Bitcoin News.
3只允许带有srcset属性的img标签
from bleach.sanitizer import Cleaner
# ALLOW ONLY img tags with src attribute
cleaner = Cleaner(tags=['img'], attributes={'img': ['srcset']}, styles=[], protocols=[], strip=True, strip_comments=True, filters=None)
print(cleaner.clean(raw_text))
输出
<img srcset="https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-768x432.jpg 768w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-300x169.jpg 300w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-1024x576.jpg 1024w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-696x392.jpg 696w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-1068x601.jpg 1068w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-747x420.jpg 747w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-190x107.jpg 190w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-380x214.jpg 380w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc-760x428.jpg 760w, https://news.bitcoin.com/wp-content/uploads/2020/08/ethereum-classic-51-attack-okex-crypto-exchange-suffers-5-6-million-loss-contemplates-delisting-etc.jpg 1280w">Cryptocurrency exchange Okex reveals it suffered the $5.6 million loss as a result of the double-spend carried out by the attacker(s) in Ethereum Classic 51% attack. Okex says it fully absorbed the loss as per its user-protection policy while insisting that the attack did not cause any loss to the platform’s users. Also as part […]
The post Ethereum Classic 51% Attack: Okex Crypto Exchange Suffers $5.6 Million Loss, Contemplates Delisting ETC appeared first on Bitcoin News.
这个方法对我来说完美无缺，不需要额外的安装:
import re
import htmlentitydefs
def convertentity(m):
if m.group(1)=='#':
try:
return unichr(int(m.group(2)))
except ValueError:
return '&#%s;' % m.group(2)
try:
return htmlentitydefs.entitydefs[m.group(2)]
except KeyError:
return '&%s;' % m.group(2)
def converthtml(s):
return re.sub(r'&(#?)(.+?);',convertentity,s)
html = converthtml(html)
html.replace(" ", " ") ## Get rid of the remnants of certain formatting(subscript,superscript,etc).
你可以编写自己的函数:
def StripTags(text):
finished = 0
while not finished:
finished = 1
start = text.find("<")
if start >= 0:
stop = text[start:].find(">")
if stop >= 0:
text = text[:start] + text[start+stop+1:]
finished = 0
return text
python 3改编自søren-løvborg的回答
from html.parser import HTMLParser
from html.entities import html5
class HTMLTextExtractor(HTMLParser):
""" Adaption of http://stackoverflow.com/a/7778368/196732 """
def __init__(self):
super().__init__()
self.result = []
def handle_data(self, d):
self.result.append(d)
def handle_charref(self, number):
codepoint = int(number[1:], 16) if number[0] in (u'x', u'X') else int(number)
self.result.append(unichr(codepoint))
def handle_entityref(self, name):
if name in html5:
self.result.append(unichr(html5[name]))
def get_text(self):
return u''.join(self.result)
def html_to_text(html):
s = HTMLTextExtractor()
s.feed(html)
return s.get_text()
