VIEWS.PY

from flask import render_template, request
from core.forms import LoginForm
from core.utils import Site
import lxml.html

@app.route('/', methods=['GET', 'POST'])
def main_page():
    form = LoginForm()
    if request.method == 'POST':
        username=request.form['username']
        password=request.form['password']
        path=Site.user_path
        s=Site.login(username, password)
        url='https://link.com/index'
        user_response=Site.get_content(Site, s, url, path)
        user=', '.join([str(x) for x in user_response])

        context={
            "user": user.replace("(", "- "),
        }
        return render_template("start_page.html", context=context)
    return render_template("index.html", form=form)

@app.route('/marks')
def marks():
    url='https://link.com/marks'
    #Here i have a problem
    return render_template("marks.html")