Newbie question.
I am using Flask, a webframe for Python. Flask uses Jinja to render the template. I do not know which version of Jinja Flask uses, nor do I know how
For Flask, you should keep the static files usually under a folder "static" and then use the url_for function. Lets say your project is called "myproject" and using your example, it should look something like:
myproject/
app.py
templates/
static/
css/
images/
icons/
resultset_previous.png
Then in the template, you can call
<img src= {{ url_for('static', filename = 'css/images/icons/resultset_previous.png') }} width="16" height="16" alt="previous" title="Previous" border="0">
Also, to answer your question about jinja versions etc, check this out
https://github.com/mitsuhiko/flask/blob/master/.travis-lowest-requirements.txt
See this section of the Flask documentation.
The correct way to refer to the static file from your template is:
<img src="{{ url_for('static', filename = 'css/images/icons/resultset_previous.png') }}" width="16" height="16" alt="previous" title="Previous" border="0">