I'm trying to search in HTML documents for specific attribute values.
e.g.
<html>
<h2 itemprop="prio1"> TEXT PRIO 1 </h2>
<span id="prio2"> TEXT PRIO 2 </span>
</html>
I want to find all items with atrributes values beginning with "prio"
I know that I can do something like:
soup.find_all(itemprop=re.compile('prio.*')) )
Or
soup.find_all(id=re.compile('prio.*')) )
But what I am looking for is something like:
soup.find_all(*=re.compile('prio.*')) )
First off your regex is wrong, if you wanted to only find strings starting with prio you would prefix with ^, as it is your regex would match prio anywhere in the string, if you were going to search each attribute you should just use str.startswith:
h = """<html>
<h2 itemprop="prio1"> TEXT PRIO 1 </h2>
<span id="prio2"> TEXT PRIO 2 </span>
</html>"""
soup = BeautifulSoup(h, "lxml")
tags = soup.find_all(lambda t: any(a.startswith("prio") for a in t.attrs.values()))
If you just want to check for certain attributes:
tags = soup.find_all(lambda t: t.get("id","").startswith("prio") or t.get("itemprop","").startswith("prio"))
But if you wanted a more efficient solution you might want to look at lxml which allows you to use wildcards:
from lxml import html
xml = html.fromstring(h)
tags = xml.xpath("//*[starts-with(#*,'prio')]")
print(tags)
Or just id an itemprop:
tags = xml.xpath("//*[starts-with(#id,'prio') or starts-with(#itemprop, 'prio')]")
I don't know if this is the best way, but this works:
>>> soup.find_all(lambda element: any(re.search('prio.*', attr) for attr in element.attrs.values()))
[<h2 itemprop="prio1"> TEXT PRIO 1 </h2>, <span id="prio2"> TEXT PRIO 2 </span>]
In this case, you can access the element use lambda in lambda element:. And we search for 'prio.*' use re.search in the element.attrs.values() list.
Then, we use any() on the result to see if there's an element which has an attribute and it's value starts with 'prio'.
You can also use str.startswith here instead of RegEx since you're just trying to check that attributes-value starts with 'prio' or not, like below:
soup.find_all(lambda element: any(attr.startswith('prio') for attr in element.attrs.values())))
Related
I need to dynamically match a string that starts with forsale_. Here, I'm finding it by hardcoding the characters that follow, but I'd like to do this dynamically:
for_sale = response.html.find('span.forsale_QoVFl > a', first=True)
I tried using startswith(), but I'm not sure how to implement it.
Sample response.html:
<section id="release-marketplace" class="section_9nUx6 open_BZ6Zt">
<header class="header_W2hzl">
<div class="header_3eShg">
<h3>Marketplace</h3>
<span class="forsale_QoVFl">2 For Sale from <span class="price_2Wkos">$355.92</span></span>
</div>
</header>
<div class="content_1TFzi">
<div class="buttons_1G_mP">Buy CDSell CD</div>
</div>
</section>
startswith() is straightforward. x = txt.startswith("forsale_") will return a bool, where txt is the string you want to test.
For more involved pattern matching, you want to look at regular expressions. Something like this is the equivalent of the startswith() line above:
import re
txt = "forsale_arbitrarychars"
x = re.search("^forsale_", txt)
where if you were to replace ^forsale_ with something like ^forsale_[0-9]*$, it would only accept ints after the underscore
I assume your final expected output is the link in the target <span>. If so, I would do it using lxml and xpath:
import lxml.html as lh
sale = """[your html above]"""
doc = lh.fromstring(sale)
print(doc.xpath('//span[#class[starts-with(.,"forsale_")]]/a/#href')[0])
Output:
/sell/release/XXX
Here is the HTML:
<div class="discount-promo" style="" xpath="1">-50%<span class="text">2a Unidad</span></div>
I extract OK text from span:
s = root.find_element_by_xpath('.//div[#class="discount-promo"]//span[#class="text"]')
s.text
'2a Unidad'
but for text inside div:
d = root.find_element_by_xpath('.//div[#class="discount-promo"]')
d.text
'-50%\n2a Unidad'
for this case I need to extract exactly "-50%", or whatever other value it takes, without having to use regex, just by XPath.
regards
You can use this XPath-1.0 expression:
.//div[#class="discount-promo"]/text()[1]
Or, in a whole:
d = root.find_element_by_xpath('.//div[#class="discount-promo"]/text()[1]')
The output should be as expected.
This short code should give you the parent element text only:
parent_element = root.find_element_by_xpath('.//div[#class="discount-promo"]')
print(driver.execute_script('return arguments[0].firstChild.textContent;', parent_element).strip())
My HTML is like :
<body>
<div class="afds">
<span class="dfsdf">mytext</span>
</div>
<div class="sdf dzf">
<h1>some random text</h1>
</div>
</body>
I want to find all tags containing "text" & their corresponding classes. In this case, I want:
span, "dfsdf"
h1, null
Next, I want to be able to navigate through the returned tags. For example, find the div parent tag & respective classes of all the returned tags.
If I execute the following
soupx.find_all(text=re.compile(".*text.*"))
it simply returns the text part of the tags:
['mytext', ' some random text']
Please help.
You are probably looking for something along these lines:
ts = soup.find_all(text=re.compile(".*text.*"))
for t in ts:
if len(t.parent.attrs)>0:
for k in t.parent.attrs.keys():
print(t.parent.name,t.parent.attrs[k][0])
else:
print(t.parent.name,"null")
Output:
span dfsdf
h1 null
find_all() does not return just strings, it returns bs4.element.NavigableString.
That means you can call other beautifulsoup functions on those results.
Have a look at find_parent and find_parents: documentation
childs = soupx.find_all(text=re.compile(".*text.*"))
for c in childs:
c.find_parent("div")
I'm trying to extract some text using Beautiful Soup. The relevant portion looks something like this.
...
<p class="consistent"><strong>RecurringText</strong></p>
<p class="consistent">Text1</p>
<p class="consistent">Text2</p>
<p class="consistent">Text3</p>
<p class="consistent"><strong>VariableText</strong></p>
...
RecurringText, as the name implies, is consistent in all the files. However, VariableText changes. The only thing it has in common is it is the next coded section. I'd like to get Text1, Text2, and Text3 extract. What comes before (up to and including RecurringText) and what comes after (including and after VariableText) can be left behind. The portion of extract from RecurringText I have found elsewhere, but I am unsure how to remove the next item, if that makes sense.
In sum, how I can extract based on the characteristic of VariableText (which the string is variable throughout the urls) consistently coming after the last item of Text1, Text2, ..., Textn (where n is different across files).
You can basically get items from p element containing strong element to another p element containing strong element:
from bs4 import BeautifulSoup
data = """
<div>
<p class="consistent"><strong>RecurringText</strong></p>
<p class="consistent">Text1</p>
<p class="consistent">Text2</p>
<p class="consistent">Text3</p>
<p class="consistent"><strong>VariableText</strong></p>
</div>
"""
soup = BeautifulSoup(data, "html.parser")
for p in soup.find_all(lambda elm: elm and elm.name == "p" and elm.text == "RecurringText" and \
"consistent" in elm.get("class") and elm.strong):
for item in p.find_next_siblings("p"):
if item.strong:
break
print(item.text)
Prints:
Text1
Text2
Text3
So I need to grab the numbers after lines looking like this
<div class="gridbarvalue color_blue">79</div>
and
<div class="gridbarvalue color_red">79</div>
Is there a way I can do a findAll('div', text=re.recompile('<>)) where I would find tags with gridbarvalue color_<red or blue>?
I'm using beautifulsoup.
Also sorry if I'm not making my question clear, I'm pretty inexperienced with this.
class is a Python keyword, so BeautifulSoup expects you to put an underscore after it when using it as a keyword parameter
>>> soup.find_all('div', class_=re.compile(r'color_(?:red|blue)'))
[<div class="gridbarvalue color_blue">79</div>, <div class="gridbarvalue color_red">79</div>]
To also match the text, use
>>> soup.find_all('div', class_=re.compile(r'color_(?:red|blue)'), text='79')
[<div class="gridbarvalue color_blue">79</div>, <div class="gridbarvalue color_red">79</div>]
import re
elems = soup.findAll(attrs={'class' : re.compile("color_(blue|red)")})
for each e in elems:
m = re.search(">(\d+)<", str(e))
print "The number is %s" % m.group(1)