Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial![](https://ecs-static.teamtreehouse.com/assets/views/marketing/shared/community-banner-white-47072046c51352fe6a69f5e691ff5700b28bb11d45197d7bdf066d9ea3f72d0c.webp)
![Chase Svoboda](https://secure.gravatar.com/avatar/2d68356474fd73add2700e204e5c943e?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Chase Svoboda
Python Development Techdegree Graduate 8,466 PointsFor Loop not working as I expected
I'm not sure what I'm missing here. It says the amount of <li>'s listed is 0 which has me thinking it's not running the loop or it's not printing out anything. Thoughts?
from flask import Flask, render_template
from teachers import TEACHERS
app = Flask(__name__)
@app.route('/')
def index():
return render_template("teachers.html", teachers=TEACHERS)
<ul class="teachers">
{% for teacher in teachers %}
<li>
<h2 name="{{ teacher }}">{{ teacher.name }}</h2>
<ul class="courses">
{% for course in courses %}
<li name="{{ course }}">{{ teacher.courses }}</li>
{% endfor %}
</ul>
</li>
{% endfor %}
</ul>
2 Answers
![Peter Vann](https://uploads.teamtreehouse.com/production/profile-photos/8935412/micro_MaiTaiPeteGravatar.jpg)
Peter Vann
36,426 PointsHi Chase!
Your mistake is here:
{% for course in courses %}
It should be:
{% for course in teacher.courses %} # the courses property (a list) for that specific teacher iteration
This passes both tasks
<ul class="teachers">
{% for teacher in teachers %}
<li>
<h2 name="{{ teacher }}">{{ teacher.name }}</h2>
<ul class="courses">
{% for course in teacher.courses %}
<li name="{{ course }}">{{ course }}</li>
{% endfor %}
</ul>
</li>
{% endfor %}
</ul>
I hope that helps.
Stay safe and happy coding!
![Chase Svoboda](https://secure.gravatar.com/avatar/2d68356474fd73add2700e204e5c943e?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Chase Svoboda
Python Development Techdegree Graduate 8,466 PointsThank you!