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Cover image for Flask Delicious Tutorial : Building a Library Management System Part 2 - Start With A Loaded Skeleton

Flask Delicious Tutorial : Building a Library Management System Part 2 - Start With A Loaded Skeleton

abdurrahmaanj profile image Abdur-Rahmaan Janhangeer ・3 min read

Previous: Part 1 - Planning

In this tutorial we'll be seeing how to run a minimal app. So that you can focus on the material, i've created a repo for you with some libs loaded.

The Three Musketeers: Bootstrap, Jquery And FontAwesome

Though we won't be using all the three right away, it's good to know what libraries we are using.

  • Bootstrap is a popular CSS framework which allows you to get beautiful websites instantly

  • JQuery is a Js library that simplifies Js coding

  • FontAwesome is a library for including icons

Our loaded skeleton

Normally you have to include those libraries via CDN to get started, but i have already included them all and configured in this repo

DeliciousFlask-2.1

Download it.

cd into the folder

To install modules do (We only have flask at the moment):

python -m pip install -r requirements.txt

To run do:

python app.py

if you go to http://127.0.0.1:5000/ you'll be greeted by:

Alt Text

Undertanding our app.py

By convention we name our file app.py. And one thing: never name your root folder or file flask as flask will throw up errors.

Our app looks like this:

from flask import Flask
from flask import render_template

app = Flask(__name__)

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == '__main__':
    app.run(debug=True)

basically we are telling to render the index.html found in the templates folder if the url is /. Flask automatically looks for files in a folder called templates.

Try changing @app.route('/') to @app.route('/hello') and go to http://127.0.0.1:5000/hello

How we linked the libs?

If you go to the head of the index file you'll see:

<head>

    <link rel="icon" href="/static/icon.png">
    <link rel="stylesheet" href="/static/bootstrap.min.css">
    <link rel="stylesheet" href="/static/fontawesome/css/all.css">


    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <script src="/static/jquery_3.2.1.min.js"></script>
    <link rel="stylesheet" href="/static/bootstrap.bundle.min.js">

    <style type="text/css">

    </style>
</head>

If you look into the static folder you'll see bootstrap.min.css. Here we added /static/ before bootstrap.min.css as flask by default assumes that assets are in the static folder and let's you link them by prefixing '/static/'.

Notes

If you change the static url you can refer it to

{{ url_for('static', filename ='bootstrap.bundle.min.js') }}

We'll cover templates in the future but that's in case you are regoing over the materials.

How we made the icons appear??

If you look into index.html you'll see in body:

<i class="fa fa-thumbs-up"></i>

It uses font awesome. By changing the classes you can change the icons.

You can view a whole lot of icons here: www.w3schools.com/icons/fontawesome5_icons_accessibility.asp

You can browse icons by selecting a different tab in the sidebar

Alt Text

To use the fab fa-accessible-icon above, we just replace the class:

<i class="fab fa-accessible-icon"></i>

Stay tuned for the next part!

My mail if you don't understand things: arj.python at gmail dot com

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