Application not picking up .css file (flask/python)

Question

I am rendering a template, that I am attempting to style with an external style sheet. File structure is as follows.

/app
    - app_runner.py
    /services
          


        

Answer 1

In jinja2 templates (which flask uses), use

href="{{ url_for('static', filename='mainpage.css')}}"

The static files are usually in the static folder, though, unless configured otherwise.