Flask Issues

[iainstott]

Ok so new problem I cant seem to get right. I am trying to define some images in the css file but they wont work.

#submit:hover {
 background: url("{{ url_for('static', filename='images/blueButton.png') }}") 0 0 no-repeat;
}

the script out put gives me

Error:
GET /static/styles/%7B%7B%20url_for('static',%20filename='images/blueButton.png')%20%7D%7D HTTP/1.1" 404 -

And I cant seem to find anywhere the correct syntax for the css.

Cheers
Iain