Mastering Flask

The beginning of our project

Finally, we can get to our first Flask project. In order to have a complex project at the end of the book, we will need a simple Flask project to start us off.

In the file named config.py, add the following:

class Config(object):
    pass

class ProdConfig(Config):
    pass

class DevConfig(Config):
    DEBUG = True

Now, in another file named main.py, add the following:

from flask import Flask
from config import DevConfig

app = Flask(__name__)
app.config.from_object(DevConfig)

@app.route('/')
def home():
    return '<h1>Hello World!</h1>'

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

For anyone who is familiar with the base Flask API, this program is very basic. It will just show Hello World! on the browser if we navigate to http://127.0.0.1:5000/ ...