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问题:

how do you use python 2.6 to remove everything including the <div class="comment"> ....remove all ....</div>

i tried various way using re.sub without any success

Thank you

回答1:

This can be done easily and reliably using an HTML parser like BeautifulSoup:

>>> from BeautifulSoup import BeautifulSoup
>>> soup = BeautifulSoup('<body><div>1</div><div class="comment"><strong>2</strong></div></body>')
>>> for div in soup.findAll('div', 'comment'):
...   div.extract()
... 
<div class="comment"><strong>2</strong></div>
>>> soup
<body><div>1</div></body>

See this question for examples on why parsing HTML using regular expressions is a bad idea.

回答2:

With lxml.html:

from lxml import html
doc = html.fromstring(input)
for el in doc.cssselect('div.comment'):
    el.drop_tree()
result = html.tostring(doc)

回答3:

You cannot properly parse HTML with regular expressions. Use a HTML parser such as lxml or BeautifulSoup.

回答4:

For the record, it is usually a bad idea to process XML with regular expressions. Nevertheless:

>>> re.sub('>[^<]*', '>', '<div class="comment> .. any… </div>')
'<div class="comment></div>'

回答5:

non regex way

pat='<div class="comment">'
for chunks in htmlstring.split("</div>"):
    m=chunks.find(pat)
    if m!=-1:
       chunks=chunks[:m]
    print chunks

output

$ cat file
one two <tag> ....</tag>
 adsfh asdf <div class="comment"> ....remove
all ....</div>s sdfds
<div class="blah" .......
.....
blah </div>

$ ./python.py
one two <tag> ....</tag>
 adsfh asdf
s sdfds
<div class="blah" .......
.....
blah

回答6:

Use Beautiful soup and do something like this to get all of those elements, and then just replace inside

tomatosoup = BeautifulSoup(myhtml)

tomatochunks = tomatosoup.findall("div", {"class":"comment"} )

for chunk in tomatochunks:
   #remove the stuff

python remove everything between
..

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python remove everything between ..

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python remove everything between
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