flask app not rendering html tags properly

Question

I have a sentence

sentence =  <p> Reading, watching or <span class="matching">listening</span> to the media isn’t <span class="matching">matching</span><span class="matching">much</span> help either. </p>

to make it render properly at front-end here is what I have done

from flask import Markup
sentence = Markup(sentence)

But the output is only rendered properly for one markup (not necessarily first one) and others are not rendered.

            <p> Reading, watching or <span class="matching">listening</span> to the media isn’t &lt;span class=&#34;matching&#34;&gt;much&lt;/span&gt; help either. </p>

What am I doing it wrong here?

In django we would do something like this: {{ variable_name|safe }} — pynovice
– pynovice, Commented Aug 6, 2013 at 10:14
I got following error when I tried your example in terminal: "UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 81: ordinal not in range(128)" Didn't you get such error? Here is the SO link to solve it: stackoverflow.com/questions/1342000/… — rajpy
– rajpy, Commented Aug 6, 2013 at 11:35
Thanks @rajpy the link you posted has an function which removes all the non ascii characters and it makes it easier. Thanks :) — Chandan Gupta
– Chandan Gupta, Commented Aug 6, 2013 at 12:09

avk · Accepted Answer · 2013-08-06 10:14:12Z

6

The culprit is the

isn’t

that "’" is not valid ASCII, because of which it doesn't come in the valid range of characters of HTML Markup , thus it escapes it (though it should throw an error)

Hope that solves the issue.

This works for me

from flask import Markup
sentence =  '<p> Reading, watching or <span class="matching">listening</span> to the media isn\'t <span class="matching">matching</span><span class="matching">much</span> help either. </p>'
Markup(sentence)

returns

Markup(u'<p> Reading, watching or <span class="matching">listening</span> to the media isn\'t <span class="matching">matching</span><span class="matching">much</span> help either. </p>')

hope that is what is the required output

answered Aug 6, 2013 at 10:14

avk

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2 Comments

Chandan Gupta Over a year ago

ok. You see the culprit and you have manually edited and added escape to make it valid HTML Markup. But I have gazillions of sentences. How do you first change those sentence to valid HTML Markup?

avk Over a year ago

well, you can write a script to either remove all characters out of range .. or replace them with a valid one .. :D

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