app.py

from flask import Flask
from helper import pets

app = Flask(__name__)


@app.route('/')
def index():
    return '''
  <h1>Adopt a Pet!</h1>
  <p>Browse through the links below to find your new furry friend:</p>
  <ul>
    <li><a href="animals/dogs">Dogs</a></li>
    <li><a href="animals/cats">Cats</a></li>
    <li><a href="animals/rabbits">Rabbits</a></li>
  </ul>
  '''


@app.route("/animals/<pet_type>")
def animals(pet_type):
    html = f"<h1>List of {pet_type}</h1>"
    html += "<ul>"
    for idx, item in enumerate(pets[pet_type]):
        html += "<li>" + \
            f'<a href="/animals/{pet_type}/{idx}">' + \
                item["name"] + "</a></li>"
    html += "</ul>"
    return html


@app.route("/animals/<pet_type>/<int:pet_id>")
def pet(pet_type, pet_id):
    pet = pets[pet_type][pet_id]
    return f'''
  <h1>{pet['name']}</h1>
  <img src="{pet['url']}">
  <p>{pet['description']}</p>
  <ul>
    <li>{pet['breed']}</li>
    <li>{pet['age']}</li>
  </ul>
  '''