Learn Flask - Basics

Flask is a well known Python web framework. Perhaps you know hivehealth wich work with on it, this website allow you to get a report on your health on hive (created by @oniemaniego). @tomoyan also use it in his series of experiments with the python library beem and Bootstrap.

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Let's go !

For this first episode, our code will only be in one file. Later in this serie, we will organize our codebase in a more modular way.

Let's create our python file:

touch flask_app.py

Then open it in your favorite editor, and open flask_app.py.

Let's make sure flask is there (type this in terminal):

pip3 install flask

(type this in terminal)

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First we will need to import flask and create a instance of the Flask class

In flask_app.py

from flask import Flask

app = Flask(__name__)


if __name__ == "__main__":
    app.run()

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Then we will add the first endpoint of our flask app with the app.route decorator

in flask_app.py

from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return 'hello world ! '

if __name__ == "__main__":
    app.run()

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Run flask_app.py with this

export FLASK_ENV=development
export FLASK_APP=flask_app
flask run

Then visit http://127.0.0.1:5000/ on your browser !

You made it to the end, bravo! If you have any questions, don't forget to ask. See you next time! If you spot a grammar or vocabulary mistake, please let me know in the comments.

You will be able to find a good part of the articles in this account in this repository.

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