How do I register filters for dynamically-generated jinja2 templates in Flask?

I am new to Flask. I am trying to generate my template dynamically so that I can make a request via AJAX and append rows to a table: ``` @app.template_filter('my_multiplier') def my_multiplier(n): return n*10 @app.route('/') def index(): content = [1,2,3,4,5] tmplate = get_template() html = tmplate.render(content=content) return render_template('index.jinja2',html=html) def get_template(): html = Template(u'''\ {% for n in conent %} <tr><td>{{ n | my_multiplier }}</td></tr> {% endfor %}''') return html ``` I get an error: TemplateAssertionError: no filter named 'my_multiplier' What am I doing wrong? (The template renders fine if I exclude the filter)