Not sure why data won't render from file into browser

Question

The '/' route is returning 'Hello world'. However, the '/data' route will not return anything. I can't figure out why it won't render anything in the browser.

from flask import Flask, render_template
import requests
import logging
from flask_sqlalchemy import SQLAlchemy
from localStoragePy import localStoragePy

app = Flask(__name__)
app.config.from_object('config')
db = SQLAlchemy(app)

token = 'Czm5aFtxepvvE4jZddlOsKXiwOzJUfl1BiFW18BfUtsUPPTkZnA663WQ13oQMdEq'
BASE_URL = 'https://canvas.sfu.ca/api/v1/courses/62319/quizzes'
headers = {'Authorization': "Bearer Czm5aFtxepvvE4jZddlOsKXiwOzJUfl1BiFW18BfUtsUPPTkZnA663WQ13oQMdEq".format(token)}
auth_response = requests.get(BASE_URL, headers=headers)
#userStringFromLocalStorage = localStoragePy.getItem('auth_response')
#userFromLocalStorage = JSON.parse(userStringFromLocalStorage)

#print(userStringFromLocalStorage)
print(auth_response.json())
#logging.warning('this is a warning')

@app.route('/')
def hello_world():
    return 'Hello world';

@app.route('/data')
def hello_world_cello():
    data = [{
      "id":164284,
      "title":"Quiz 1",
      "html_url":"https://canvas.sfu.ca/courses/62319/quizzes/164284",
      "mobile_url":"https://canvas.sfu.ca/courses/62319/quizzes/164284?force_user=1&persist_headless=1",
      "description":"",
      "quiz_type":"assignment",
      "time_limit":"None",
      "timer_autosubmit_disabled":false,
      "shuffle_answers":false,
      "show_correct_answers":true,
      "scoring_policy":"keep_highest",
      "allowed_attempts":1,
      "one_question_at_a_time":false,
      "question_count":2,
      "points_possible":2.0,
      "cant_go_back":false,
      "access_code":"None",
      "ip_filter":"None",
      "due_at":"None",
      "lock_at":"None",
      "unlock_at":"None",
      "published":true,
      "unpublishable":true,
      "locked_for_user":true,
      "lock_info":{
         "missing_permission":"participate_as_student",
         "asset_string":"quizzes:quiz_164284"
      },
      "lock_explanation":"This quiz is currently locked.",
      "hide_results":"None",
      "show_correct_answers_at":"None",
      "hide_correct_answers_at":"None",
      "all_dates":[
         {
            "id":53086,
            "due_at":"2021-05-06T06:59:59Z",
            "unlock_at":"None",
            "lock_at":"None",
            "title":"Entrepreneursity Test",
            "set_type":"CourseSection",
            "set_id":131870
         }
      ],
      "can_unpublish":true,
      "can_update":true,
      "require_lockdown_browser":false,
      "require_lockdown_browser_for_results":false,
      "require_lockdown_browser_monitor":false,
      "lockdown_browser_monitor_data":"None",
      "speed_grader_url":"https://canvas.sfu.ca/courses/62319/gradebook/speed_grader?assignment_id=630900",
      "permissions":{
         "manage":true,
         "read":true,
         "update":true,
         "create":true,
         "submit":true,
         "preview":true,
         "delete":true,
         "read_statistics":true,
         "grade":true,
         "review_grades":true,
         "view_answer_audits":false
      },
      "quiz_reports_url":"https://canvas.sfu.ca/api/v1/courses/62319/quizzes/164284/reports",
      "quiz_statistics_url":"https://canvas.sfu.ca/api/v1/courses/62319/quizzes/164284/statistics",
      "message_students_url":"https://canvas.sfu.ca/api/v1/courses/62319/quizzes/164284/submission_users/message",
      "section_count":1,
      "quiz_submission_versions_html_url":"https://canvas.sfu.ca/courses/62319/quizzes/164284/submission_versions",
      "assignment_id":630900,
      "one_time_results":false,
      "only_visible_to_overrides":true,
      "assignment_group_id":154901,
      "show_correct_answers_last_attempt":false,
      "version_number":3,
      "has_access_code":false,
      "post_to_sis":false,
      "migration_id":"None"
   }]
    return render_template('pages/venues.html', areas=data);

venues.html looks like the following

{% extends 'layouts/main.html' %}
{% block title %}Fyyur | Venues{% endblock %}
{% block content %}
{% for area in areas %}
{{ area.id }}, {{ area.title }}
    
    
{% endfor %}
{% endblock %}

main.html




{% block title %}{% endblock %}


































  
  

    
    
      
        
          
          
        
        
          
            
              {% if (request.endpoint == 'venues') or
                (request.endpoint == 'search_venues') or
                (request.endpoint == 'show_venue') %}
              
                
              
              {% endif %}
              {% if (request.endpoint == 'artists') or
                (request.endpoint == 'search_artists') or
                (request.endpoint == 'show_artist') %}
              
                
              
              {% endif %}
            
          
          
            Venues
            Artists
            Shows
          
        

      
    

    
    

      {% with messages = get_flashed_messages() %}
        {% if messages %}
          {% for message in messages %}
            
              ×
              {{ message }}
            
          {% endfor %}
        {% endif %}
      {% endwith %}

      {% block content %}{% endblock %}

    

  

  
    
      Fyyur © All Rights Reserved.
      {% block footer %}{% endblock %}

I am trying to return 'data' variable in the '/data' route. I am using Flask as my environment. I haven't created a database yet to store these.

user_11982933 · Answer

Ok, i'm now home, i'll thanks for editing with the main.html

So, your error probably come from here

Venues
            Artists
            Shows

You're asking flask to generate a url for venues, artist, and shows. The problem is that you never define these routes, flask can't create a URL for something that doesn't exist.

You have two solution :

You define your href with a relative url : href="/artists" for example, this will lead to http(s)://{host}/artists This is the good old html way, and it's working easily.
You can define temporary void routes for these, for example :

@app.route('/artists')
def artists():
    return ''

This will return a blank page.

With that and the previous comments i leaved, you should be able to make that working.

You should have error on your Flask app, check it out if you can, even if the error code doesn't help you, it can help other people to understand what's wrong.

Tell me if that helped.

Not sure why data won't render from file into browser

1 Answers