Routing in Flask Application

Routes in Flask

This is post is continuation of this post

A fully functional website has multiple routes like /about for About page or /contact for contact Page.

We can create routes in Flask by calling route function on our app function. First argument of this function is the endpoint. It always start with a forward slash — /<route>

Let’s see this in action by creating a /about route to our hello world application. Right now your app.py file should look like this.

from  flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return "Hello World"

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

We pass debug=True in app.run() so that it automatically detect the changes and restart the app.

Now add the code for /about route down below / route and above if statement.

@app.route('/about')
def about():
    return "This is About page"

Open your browser and go the following link — localhost:5000/about. You should see the following output.

Todo for you

Add a route for contact page and display “You are on contact page”.

Once you are done check your answer down below.

Code for /contact route

@app.route("/contact")
def contact():
    return "You are on contact page"

We can also create nested routes like /auth/login or /users/pysimplify. Let’s see this in action.

@app.route('/auth/login')
def login():
    return "You are on login Page"

Navigate to localhost:5000/auth/login to view this page in your browser. You should see something like this .

So far we have covered how to create simple routes and nested routes. Now we will see how to use variable routes i.e. using varaible in routess.

For example: /user/<user-num>