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Posts Tagged ‘bleach’
remove tags from HTML
July 13, 2016
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Problem
You have an HTML string and you want to remove all the tags from it.
Solution
Install the package “bleach” via pip. Then:
>>> import bleach
>>> html = "Her <h1>name</h1> was <i>Jane</i>."
>>> cleaned = bleach.clean(html, tags=[], attributes={}, styles=[], strip=True)
>>> html
'Her <h1>name</h1> was <i>Jane</i>.'
>>> cleaned
'Her name was Jane.'
Tip from here.
Flask: linkify a text
July 12, 2015
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Problem
I have a text that I present in a Flask application. The text can contain URLs, and I would like to linkify them, i.e. make them clickable links. Example:
before:
visit http://google.com for...
after:
visit <a href="http://google.com">http://google.com</a> for...
Solution
Before rolling out an own solution, it’s a good idea to check if there is a package for this problem. There is :), and it’s called bleach. Its usage couldn’t be simpler:
>>> import bleach
>>> bleach.linkify('an http://example.com url')
u'an <a href="http://example.com" rel="nofollow">http://example.com</a> url
Flask integration
In your main file (that calls app.run()) add the following filter:
import bleach
@app.template_filter('linkify')
def linkify(s):
return bleach.linkify(s)
Then use it in your jinja2 templates:
Description: {{ entry.description|linkify|safe }}
Warning! Apply the “safe” filter only if you trust the origin of the text you want to present in a linkified format.
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